AN ITERATIVE METHOD FOR CALCULATING SEVERAL OF THE EXTREME EIGENSOLUTIONS OF LARGE REAL NON-SYMMETRIC MATRICESRETTRUP S.1982; J. COMPUT. PHYS.; ISSN 0021-9991; USA; DA. 1982; VOL. 45; NO 1; PP. 100-107; BIBL. 14 REF.Article

ON R(4) SYMMETRIES IN ATOMIC STRUCTURERETTRUP S; CHISHOLM CDH.1980; THEOR. CHIM. ACTA; ISSN 0040-5744; DEU; DA. 1980; VOL. 57; NO 3; PP. 209-218; BIBL. 17 REF.Article

Direct evaluation of spin representation matrices and ordering of permutation-group elementsRETTRUP, S.International journal of quantum chemistry. 1986, Vol 29, Num 1, pp 119-128, issn 0020-7608Article

A PROGRAMMABLE SPIN-FREE METHOD FOR CONFIGURATION INTERACTION.SARMA CR; RETTRUP S.1977; THEOR. CHIM. ACTA; ALLEM.; DA. 1977; VOL. 46; NO 1; PP. 63-71; BIBL. 18 REF.Article

A RECURSIVE FORMULA FOR YOUNG'S ORTHOGONAL REPRESENTATION.RETTRUP S.1977; CHEM. PHYS. LETTERS; NETHERL.; DA. 1977; VOL. 47; NO 1; PP. 59-60; BIBL. 3 REF.Article

A PROGRAMMABLE PROCEDURE FOR GENERATING MANY-PARTICLE STATESRETTRUP S; SARMA CR.1980; PHYS. LETT. B; ISSN 0370-2693; NLD; DA. 1980; VOL. 75; NO 3; PP. 181-182; BIBL. 5 REF.Article

A NEW PROGRAM FOR CI CALCULATIONS IN MOLECULES.RETTRUP S; SARMA CR.1977; THEOR. CHIM. ACTA; ALLEM.; DA. 1977; VOL. 46; NO 1; PP. 73-76; BIBL. 8 REF.Article

AB INITIO CALCULATIONS OF ELECTROSTATIC POTENTIALS AND DEFORMATION DENSITIES FOR A SERIES OF CHOLINE ESTER MODEL SYSTEMSJOHANSEN H; RETTRUP S; JENSEN B et al.1980; THEOR. CHIM. ACTA; DEU; DA. 1980; VOL. 55; NO 4; PP. 267-281; BIBL. 21 REF.Article

GROUP THEORETICAL TECHNIQUES AND THE MANY-ELECTRON PROBLEMDINESHA KV; SARMA CR; RETTRUP S et al.1981; ADV. QUANTUM CHEM.; ISSN 0065-3276; USA; DA. 1981; VOL. 14; PP. 125-168; BIBL. 2 P.Article

MOLECULAR POINT GROUP ADAPTATION OF SPIN-FREE CONFIGURATIONSRETTRUP S; SARMA CR; DAHL JP et al.1982; INT. J. QUANTUM CHEM.; ISSN 0020-7608; USA; DA. 1982; VOL. 22; NO 1; PP. 127-148; BIBL. 28 REF.Article

Average virtual orbitals in configuration interaction studies with application to the low-lying singlet states of the carbon monoxide and acetone moleculesMOGENSEN, B. J; RETTRUP, S.International journal of quantum chemistry. 1992, Vol 44, Num 6, pp 1045-1056, issn 0020-7608Article

A graphical approach to configuration interaction studies in molecules using determinants of nonorthogonal orbitalsRETTRUP, S; THORSTEINSSON, T; SARMA, C. R et al.International journal of quantum chemistry. 1991, Vol 40, Num 5, pp 709-717, issn 0020-7608Article

Ab initio configuration interaction study of the Rydberg states of the hydroxymethyl radical CH₂OHRETTRUP, S; PAGSBERG, P; ANASTASI, C et al.Chemical physics. 1988, Vol 122, Num 1, pp 45-51, issn 0301-0104Article

An indexing scheme for spin-free configurations of electronsDINESHA, K. V; RETTRUP, S; SARMA, C. R et al.International journal of quantum chemistry. 1988, Vol 34, Num 5, pp 445-455, issn 0020-7608Article

A permutation-group direct configuration interaction procedure for se cond order molecular properties. Program implementation with application to the A²Σ⁺←X²Π two-photon transition of the OH radicalBENDAZZOLI, G. L; PALMIERI, P; RETTRUP, S et al.The Journal of chemical physics. 1989, Vol 91, Num 9, pp 5518-5527, issn 0021-9606Article

Electron density of orthoboric acid determined by X-ray diffraction at 105 K and ab initio calculationsGAJHEDE, M; LARSEN, S; RETTRUP, S et al.Acta crystallographica. Section B, Structural science. 1986, Vol 42, Num 6, pp 545-552, issn 0108-7681Article

A comment on several results of CI calculations for H₂ODUCH, W; KARKOWSKI, J; DIERCKSEN, G. H. F et al.Chemical physics letters. 1988, Vol 144, Num 4, pp 421-422, issn 0009-2614Article