LARGE SCALE CONTRACTED MC-CI CALCULATIONS ON ACETYLENE AND ITS DISSOCIATION INTO TWO CH(²PI ) RADICALSSIEGBAHN PEM.1981; J. CHEM. PHYS.; ISSN 0021-9606; USA; DA. 1981; VOL. 75; NO 5; PP. 2314-2320; BIBL. 19 REF.Article

GENERALIZATIONS OF THE DIRECT CI METHOD BASED ON THE GRAPHICAL UNITARY GROUP APPROACH. II: SINGLE AND DOUBLE REPLACEMENTS FROM ANY SET OF REFERENCE CONFIGURATIONSSIEGBAHN PEM.1980; J. CHEM. PHYS.; ISSN 0021-9606; USA; DA. 1980; VOL. 72; NO 3; PP. 1647-1656; BIBL. 37 REF.Article

DIRECT CONFIGURATION INTERACTION WITH A REFERENCE STATE COMPOSED OF MANY REFERENCE CONFIGURATIONSSIEGBAHN PEM.1980; INT. J. QUANTUM CHEM.; ISSN 0020-7608; USA; DA. 1980; VOL. 18; NO 5; PP. 1229-1242; BIBL. 21 REF.Article

A DIRECT CI METHOD WITH A MULTICONFIGURATIONAL REFERENCE STATEROOS BO; SIEGBAHN PEM.1980; INT. J. QUANTUM CHEM.; ISSN 0020-7608; USA; DA. 1980; VOL. 17; NO 3; PP. 485-500; ABS. FRE/GER; BIBL. 24 REF.Article

SINGLET AND TRIPLET ENERGY SURFACES OF NIH₂BLOMBERG MRA; SIEGBAHN PEM.1983; JOURNAL OF CHEMICAL PHYSICS; ISSN 0021-9606; USA; DA. 1983; VOL. 78; NO 9; PP. 5682-5692; BIBL. 31 REF.Article

THE RADIATIVE LIFETIME OF THE A¹PI STATE OF CH⁺ CALCULATED FROM LONG CAS SCF EXPANSIONSLARSSON M; SIEGBAHN PEM.1983; CHEMICAL PHYSICS; ISSN 0301-0104; NLD; DA. 1983; VOL. 76; NO 2; PP. 175-184; BIBL. 32 REF.Article

BERYLLIUM DIMER, A CRITICAL TEST CASE OF MBPT AND CI METHODSBLOMBERG MRA; SIEGBAHN PEM.1978; INTERNATION. J. QUANTUM CHEM.; USA; DA. 1978; VOL. 14; NO 5; PP. 583-592; BIBL. 24 REF.Article

AN IMPORTANT BOUND SINGLET STATE OF NIH₂BLOMBERG MRA; SIEGBAHN PEM.1983; JOURNAL OF CHEMICAL PHYSICS; ISSN 0021-9606; USA; DA. 1983; VOL. 78; NO 2; PP. 986-987; BIBL. 11 REF.Article

COMPLETE-ACTIVE-SPACE SELF-CONSISTENT-FIELD AND CONTRACTED CONFIGURATION-INTERACTION STUDY OF THE ELECTRON CORRELATION IN NE, F^-, NE⁺, AND FROOS BO; SADLEJ AJ; SIEGBAHN PEM et al.1982; PHYS. REV. A; ISSN 0556-2791; USA; DA. 1982; VOL. 26; NO 3; PP. 1192-1199; BIBL. 44 REF.Article

ON THE NATURE OF THE BONDING IN CU₂BAUSCHLICHER CW JR; WALCH SP; SIEGBAHN PEM et al.1982; J. CHEM. PHYS.; ISSN 0021-9606; USA; DA. 1982; VOL. 76; NO 12; PP. 6015-6017; BIBL. 15 REF.Article

THEORETICAL INVESTIGATION OF THE ELIMINATION AND ADDITION REACTIONS OF METHANE AND ETHANE WITH NICKELBLOMBERG MRA; BRANDEMARK U; SIEGBAHN PEM et al.1983; JOURNAL OF THE AMERICAN CHEMICAL SOCIETY; ISSN 0002-7863; USA; DA. 1983; VOL. 105; NO 17; PP. 5557-5563; BIBL. DISSEM.Article

THEORETICAL STUDY OF THE LITHIIUM DIMER AND ITS ANIONPARTRIDGE H; BAUSCHLICHER CW JR; SIEGBAHN PEM et al.1983; CHEMICAL PHYSICS LETTERS; ISSN 0009-2614; NLD; DA. 1983; VOL. 97; NO 2; PP. 198-203; BIBL. 21 REF.Article

ON THE NATURE OF THE BONDING IN CU₂ - AN AB INITIO VIEWPOINTBAUSCHLICHER CW JR; WALCH SP; SIEGBAHN PEM et al.1983; JOURNAL OF CHEMICAL PHYSICS; ISSN 0021-9606; USA; DA. 1983; VOL. 78; NO 6; PART. 1; PP. 3347-3348; BIBL. 5 REF.Article

THE BINDING IN CLF₃PETTERSSON LGM; SIEGBAHN PEM; GROPEN O et al.1983; MOLECULAR PHYSICS; ISSN 0026-8976; GBR; DA. 1983; VOL. 48; NO 4; PP. 871-884; BIBL. 31 REF.Article

A THEORETICAL STUDY OF THE LOWEST SINGLET AND TRIPLET SURFACES OF C₂H₂SSIEGBAHN PEM; YOSHIMINE M; PACANSKY J et al.1983; JOURNAL OF CHEMICAL PHYSICS; ISSN 0021-9606; USA; DA. 1983; VOL. 78; NO 3; PP. 1384-1389; BIBL. 24 REF.Article

MCSCF AND MULTI-REFERENCE CI CALCULATIONS OF THE POTENTIAL ENERGY SURFACE FOR GROUND STATE H₂OKRAEMER WP; ROOS BO; SIEGBAHN PEM et al.1982; CHEM. PHYS.; ISSN 0301-0104; NLD; DA. 1982; VOL. 69; NO 3; PP. 305-321; BIBL. 40 REF.Article

A THEORETICAL STUDY OF NIH. OPTICAL SPECTRUM AND POTENTIAL CURVESBLOMBERG MRA; SIEGBAHN PEM; ROOS BO et al.1982; MOL. PHYS.; ISSN 0026-8976; GBR; DA. 1982; VOL. 47; NO 1; PP. 127-143; BIBL. 33 REF.Article

THE COMPLETE ACTIVE SPACE CSF (CASSCF) METHOD IN A NEWTON-RAPHSON FORMULATION WITH APPLICATION TO THE HNO MOLECULESIEGBAHN PEM; ALMLOEF J; HEIBERG A et al.1981; J. CHEM. PHYS.; ISSN 0021-9606; USA; DA. 1981; VOL. 74; NO 4; PP. 2384-2396; BIBL. 50 REF.Article

A CRITICAL STUDY OF BASIS SET EFFECTS AND THE USE OF APPROXIMATE NATURAL ORBITALS IN SCF-CI CALCULATIONS OF MOLECULAR GEOMETRIES AND HEATS OF REACTION.KARLSTROM G; JONSSON B; ROOS BO et al.1978; THEOR. CHIM. ACTA; ALLEM.; DA. 1978; VOL. 48; NO 1; PP. 59-74; BIBL. 39 REF.Article

A SIMPLE METHOD FOR THE EVALUATION OF THE SECOND-ORDER PERTURBATION ENERGY FROM EXTERNAL DOUBLE-EXCITATIONS WITH A CASSCF REFERENCE WAVEFUNCTIONROOS BO; LINSE P; SIEGBAHN PEM et al.1982; CHEM. PHYS.; ISSN 0301-0104; NLD; DA. 1982; VOL. 66; NO 1-2; PP. 197-207; BIBL. 27 REF.Article