THE CRYSTAL AND MOLECULAR STRUCTURE OF DIMEDONE.SEMMINGSEN D.1974; ACTA CHEM. SCAND., B; DANEM.; DA. 1974; VOL. 28; NO 2; PP. 169-174; BIBL. 18 REF.Article

THE CRYSTAL STRUCTURE OF PHENYLMALONDIALDEHYDE AT -162^OC.SEMMINGSEN D.1977; ACTA CHEM. SCAND., B; DANEM.; DA. 1977; VOL. 31; NO 2; PP. 114-118; BIBL. 17 REF.Article

THE STRUCTURE OF SQUARIC ACID (3,4-DIHYDROXY-3-CYCLOBUTENE-1,2-DIONE)SEMMINGSEN D.1973; TETRAHEDRON LETTERS; G.B.; DA. 1973; NO 11; PP. 807-808; BIBL. 4 REF.Serial Issue

THE CRYSTAL AND MOLECULAR STRUCTURE OF 2,5-DIHYDROXY-1,4-BENZOQUINONE AT -162^OC.SEMMINGSEN D.1977; ACTA CHEM. SCAND., B; DANEM.; DA. 1977; VOL. 31; NO 1; PP. 11-14; BIBL. 18 REF.Article

THE CRYSTAL STRUCTURE DETERMINATION OF LITHIUM 2-HYDROXY-3,4-DIOXOCYCLOBUT-1-EN-1-OLATE MONOHYDRATE, LIHC₄O₄.H₂O.SEMMINGSEN D.1976; ACTA CHEM. SCAND, A; DANEM.; DA. 1976; VOL. 30; NO 10; PP. 808-812; BIBL. 17 REF.Article

THE CRYSTAL STRUCTURE OF TRIOSE REDUCTONE.SEMMINGSEN D.1974; ACTA CHEM. SCAND., B; DANEM.; DA. 1974; VOL. 28; NO 2; PP. 141-146; BIBL. 15 REF.Article

THE CRYSTAL STRUCTURE OF REDUCTIC ACID (2-CYCLOPENTENE-2,3-DIOL-1-ONE).SEMMINGSEN D.1977; ACTA CHEM. SCAND., B; DANEM.; DA. 1977; VOL. 31; NO 1; PP. 81-85; BIBL. 14 REF.Article

ON THE STRUCTURE OF DEUTERATED SQUARIE ACID, C₄D₂O₄, AT ROOM TEMPERATURE.SEMMINGSEN D.1975; ACTA CHEM. SCAND., A; DANEM.; DA. 1975; VOL. 59; NO 4; PP. 470-473; BIBL. 8 REF.Article

Neutron diffraction refinement of the structure of pentaerythritolSEMMINGSEN, D.Acta chemica Scandinavica. Series A. Physical and inorganic chemistry. 1988, Vol 42, Num 5, pp 279-283, issn 0302-4377Article

STRUCTURE AND HYDROGEN BONDING IN THE ENOL FORM OF 5,6-DIACETYL-2,9-DIMETHYL-4,7-DECANEDIONE IN THE SOLID STATE.GROTH P; SEMMINGSEN D.1976; ACTA CHEM. SCAND., B; DANEM.; DA. 1976; VOL. 30; NO 8; PP. 737-742; BIBL. 16 REF.Article

EFFECTS OF PRESSURE ON THE DIELECTRIC PROPERTIES AND PHASE TRANSITIONS OF THE 2-D ANTIFERROELECTRIC SQUARIC ACID: (H₂C₄O₄ AND D₂C₄O₄)SAMARA GA; SEMMINGSEN D.1979; J. CHEM. PHYS.; ISSN 0021-9606; USA; DA. 1979; VOL. 71; NO 3; PP. 1401-1407; BIBL. 22 REF.Article

SQUARIC ACID, A TWO-DIMENSIONAL HYDROGEN-BONDED MATERIAL WITH A PHASE TRANSITION.SAMUELSEN EJ; SEMMINGSEN D.1975; SOLID STATE COMMUNIC.; G.B.; DA. 1975; VOL. 17; NO 2; PP. 217-219; BIBL. 12 REF.Article

NEUTRON DIFFRACTION REFINEMENT OF THE STRUCTURE OF GYPSUM CASO₄2H₂O = AFFINEMENT A PARTIR DES DONNEES DE DIFFRACTION NEUTRONIQUE DE LA STRUCTURE DU GYPSEPEDERSEN BF; SEMMINGSEN D.1982; ACTA CRYSTALLOGR., B; ISSN 0567-7408; DNK; DA. 1982; VOL. 38; NO 4; PP. 1074-1077; BIBL. 27 REF.; TABL.Article

A STRUCTURAL PHASE TRANSITION IN SQUARIC ACID.SEMMINGSEN D; FEDER J.1974; SOLID STATE COMMUNIC.; G.B.; DA. 1974; VOL. 15; NO 8; PP. 1369-1372; ABS. ALLEM.; BIBL. 6 REF.Article

THE PHASE TRANSITION OF TWO-DIMENSIONAL SQUARIC ACID H₂C₄O₄ STUDIED BY NEUTRON SCATTERING.SAMUELSEN EJ; SEMMINGSEN D.1977; J. PHYS. CHEM. SOLIDS; G.B.; DA. 1977; VOL. 38; NO 11; PP. 1275-1283; BIBL. 18 REF.Article

THE PHASE TRANSITION OF TWO-DIMENSIONAL SQUARIC ACID H₂C₄O₄ STUDIED BY RAMAN SCATTERINGSAMUELSEN EJ; FJAER E; SEMMINGSEN D et al.1979; J. PHYS. C; GBR; DA. 1979; VOL. 12; NO 11; PP. 2007-2014; BIBL. 10 REF.Article

NEUTRON-SCATTERING STUDY OF THE FERROELECTRIC PHASE TRANSITION IN CSD₂PO₄.SEMMINGSEN D; ELLENSON WD; FRAZER BC et al.1977; PHYS. REV. LETTERS; U.S.A.; DA. 1977; VOL. 38; NO 22; PP. 1299-1302; BIBL. 9 REF.Article

THE MOLECULAR AND CRYSTAL STRUCTURE OF SQUARIC ACID (3,4-DIHYDROXY-3-CYCLOBUTENE-1,2-DIONE) AT 121^OC: A NEUTRON DIFFRACTION STUDY.HOLLANDER FJ; SEMMINGSEN D; KOETZLE TF et al.1977; J. CHEM. PHYS.; U.S.A.; DA. 1977; VOL. 67; NO 11; PP. 4825-4831; BIBL. 22 REF.Article

A NEUTRON DIFFRACTION STUDY OF SQUARIC ACID (3,4-DIHYDROXY-3-CYCLOBUTENE-1,2-DIONE).SEMMINGSEN D; HOLLANDER FJ; KOETZLE TF et al.1977; J. CHEM. PHYS.; U.S.A.; DA. 1977; VOL. 66; NO 10; PP. 4405-4412; BIBL. 29 REF.Article

ACETAMIDE HEMIHYDROCHLORIDE, BY NEUTRON DIFFRACTION AT 120 KSPEAKMAN JC; LEHMANN MS; ALLIBON JR et al.1981; ACTA CRYSTALLOGR., B; ISSN 0567-7408; DNK; DA. 1981; VOL. 37; NO 11; PP. 2098-2100; BIBL. 15 REF.Article

The crystal and molecular structure of semisquaric acid (3-hydroxy-3-cyclobutene-1,2-dione)SEMMINGSEN, D; GROTH, P.Acta chemica Scandinavica. Series B. Organic chemistry and biochemistry. 1988, Vol 42, Num 1, pp 1-6, issn 0302-4369Article

Deltic acid, a novel compoundSEMMINGSEN, D; GROTH, P.Journal of the American Chemical Society. 1987, Vol 109, Num 23, pp 7238-7239, issn 0002-7863Article

ONE-DIMENSIONAL ORDERING IN FERROELECTRIC CSD₂PO₄ AND CSH₂PO₄ AS STUDIED WITH NEUTRON SCATTERINGFRAZER BC; SEMMINGSEN D; ELLENSON WD et al.1979; PHYS. REV. B; ISSN 0163-1829; USA; DA. 1979; VOL. 20; NO 7; PP. 2745-2754; BIBL. 22 REF.Article

The molecular and crystal structure of 3,4-furandicarboxylic acidSEMMINGSEN, D; NORDENSON, S; AASEN, A et al.Acta chemica Scandinavica. Series A. Physical and inorganic chemistry. 1986, Vol 40, Num 9, pp 559-565, issn 0302-4377Article

Theoretical study and experimental observations of lattice vibrations in squaric acidBOUGEARD, D; SAMUELSEN, E. J; SEMMINGSEN, D et al.The Journal of chemical physics. 1985, Vol 82, Num 3, pp 1454-1458, issn 0021-9606Article