ON THE ZERO TEMPERATURE CRITICAL BEHAVIOUR OF THE XY MODEL IN A TRANSVERSE FIELDGOLDHIRSCH I.1979; J. PHYS. C: SOLID STATE PHYS.; ISSN 0022-3719; GBR; DA. 1979; VOL. 12; NO 24; PP. 5345-5349; BIBL. 6 REF.Article

STATIC AND DYNAMIC PROPERTIES OF THE CLASSICAL XY CHAINGERLING RW; LANDAU DP.1983; PHYSICAL REVIEW. B: CONDENSED MATTER; ISSN 0163-1829; USA; DA. 1983; VOL. 27; NO 3; PP. 1719-1724; BIBL. 14 REF.Article

TRANSVERSE SPIN CORRELATION FUNCTION OF THE ONE-DIMENSIONAL SPIN-1/2 XY MODELTONEGAWA T.1981; SOLID STATE COMMUN.; ISSN 0038-1098; USA; DA. 1981; VOL. 40; NO 11; PP. 983-986; BIBL. 7 REF.Article

VARIATIONAL STUDY ON THE GROUND STATE OF THE SPIN 1/2 XY MAGNETSUZUKI M; MIYASHITA S.1978; CANAD. J. PHYS.; CAN; DA. 1978; VOL. 56; NO 7; PP. 902-912; ABS. FRE; BIBL. 22 REF.Article

Critical behavior of pure and diluted XY models with uniform frustrationsCHOI, M. Y; STROUD, D.Physical review. B, Condensed matter. 1985, Vol 32, Num 9, pp 5773-5775, issn 0163-1829Article

FIRST-, SECOND-, AND INFINITE-ORDER TRANSITIONS IN THREE-DIMENSIONAL MODELS WITH COMPETING INTERACTIONSGRINSTEIN G; JAYAPEAKASH C.1982; PHYS. REV. B; ISSN 0163-1829; USA; DA. 1982; VOL. 25; NO 1; PP. 523-526; BIBL. 20 REF.Article

SPIN ANISOTROPY EFFECTS ON THE DIMERIZATION OF THE MAGNETOSTRICTIVE QUASI-ONE-DIMENSIONAL XY MODELTSALLIS C; DA SILVA DMH.1982; SOLID STATE COMMUNICATIONS; ISSN 0038-1098; USA; DA. 1982; VOL. 43; NO 12; PP. 895-898; BIBL. 18 REF.Article

SPIN GLASS PHASE TRANSITION IN RANDOM-AXES XY MAGNETDOTSENKO VS; FEIGELMAN MV.1982; JOURNAL OF PHYSICS. C. SOLID STATE PHYSICS; ISSN 0022-3719; GBR; DA. 1982; VOL. 15; NO 18; PP. L565-L568; BIBL. 10 REF.Article

HIGH-TEMPERATURE STUDY OF PLANAR ROTATOR -AND XY - MODELS FOR DIMENSIONS D >OU= 2HOLZ A.1981; MATH. PHYS. APPL. MATH.; ISSN 0165-2419; NLD; DA. 1981; NO 6; PP. 277-294; BIBL. 15 REF.Article

SPIN ON BIQUADRATIC XY MODELCHADDHA G.1980; J. PHYS. CHEM. SOLIDS; ISSN 0022-3697; USA; DA. 1980; VOL. 41; NO 8; PP. 923-924; BIBL. 8 REF.Article

HIGH-TEMPERATURE REPRESENTATION OF ANISOTROPIC ROTATOR, XY AND HEISENBERG MODELS FOR DIMENSIONS D >OU= 2HOLZ A.1979; J. PHYS. A; GBR; DA. 1979; VOL. 12; NO 11; PP. 2099-2110; BIBL. 12 REF.Article

CONDITIONS FOR T_C=0K FOR THE FERROMAGNETIC PHASE OF THREE-DIMENTIONAL QUANTUM HEISENBERG MODELSHORNREICH RM; LUBAN M.1978; PHYS. REV., B; USA; DA. 1978; VOL. 18; NO 7; PP. 3544-3548; BIBL. 18 REF.Article

THE GROUND STATE OF TWO QUANTUM MODELS OF MAGNETISMOITMAA J; BETTS DD.1978; CANAD. J. PHYS.; CAN; DA. 1978; VOL. 56; NO 7; PP. 897-901; ABS. FRE; BIBL. 24 REF.Article

CLASSICAL STATISTICAL APPROACH TO ANISOTROPIC TWO-DIMENSIONAL XY-MODEL.TSALLIS C.1976; NUOVO CIMENTO, B; ITAL.; DA. 1976; VOL. 34; NO 2; PP. 411-435; ABS. ITAL. RUSSE; BIBL. 16 REF.Article

THE ANISOTROPIC HEISENBERG MODEL: HIGH TEMPERATURE SERIES EXPANSIONS IN THE REGIME OF PLANAR ORDERING.ROGIERS J.1976; PHYS. LETTERS, A; NETHERL.; DA. 1976; VOL. 58; NO 5; PP. 295-297; BIBL. 11 REF.Article

ON THE ZERO-TEMPERATURE CRITICAL BEHAVIOUR OF THE QUANTUM X-Y MODEL IN A TRANSVERSE MAGNETIC FIELDKOPEC TK; KOZLOWSKI G.1983; PHYSICS LETTERS SECTION A; ISSN 0375-9601; NLD; DA. 1983; VOL. 95; NO 2; PP. 104-106; BIBL. 14 REF.Article

TWO-DIMENSIONAL CLASSICAL XY MODEL WITH SYMMETRY-BREAKING FIELDSNAKAYAMA I; TSUNETO T.1981; PROG. THEOR. PHYS.; ISSN 0033-068X; JPN; DA. 1981; VOL. 65; NO 4; PP. 1246-1263; BIBL. 16 REF.Article

MONTE CARLO SIMULATION OF THE PLANARD MODEL USING THE DUAL SOLID-ON-SOLID REPRESENTATIONSHUGARD WJ; WEEKS JD; GILMER GH et al.1980; PHYS. REV. B; ISSN 0163-1829; USA; DA. 1980; VOL. 21; NO 11; PP. 5309-5311; BIBL. 20 REF.Article

STUDY OF THE FINITE-TEMPERATURE TRANSVERSE-AUTOCORRELATION FUNCTION IN ONE-DIMENSIONAL SPIN -1/2 XY MODELSMOHAN M.1980; PHYS. REV. B; ISSN 0163-1829; USA; DA. 1980; VOL. 21; NO 3; PP. 1264-1270; BIBL. 25 REF.Article

SUSCEPTIBILITIES OF THE S=1/2XY MODEL ON THE SQUARE LATTICE AT T=OOTIMAA J; BETTS DD; MARLAND LG et al.1980; PHYS. LETT. SECT. A; ISSN 0375-9601; NLD; DA. 1980; VOL. 79; NO 23; PP. 193-195; BIBL. 4 REF.Article

A COMPARISON OF PLANE ROTOR AND ISING MODELSAIZENMAN M; SIMON B.1980; PHYS. LETT. B; ISSN 0370-2693; NLD; DA. 1980; VOL. 76; NO 3-4; PP. 281-282; BIBL. 9 REF.Article

HIGH-TEMPERATURE LONGITUDINAL SUSCEPTIBILITY FOR THE S=1/2 XY MODEL. SOME NUMERICAL EVIDENCESKIM IM; LEE MH.1979; PHYS. REV., B; USA; DA. 1979; VOL. 19; NO 11; PP. 5815-5816; BIBL. 6 REF.Article

AN INEQUALITY FOR SPIN-S X-Y FERROMAGNETSPEARCE PA.1979; PHYS. LETTERS, A; NLD; DA. 1979; VOL. 70; NO 2; PP. 117-118; BIBL. 9 REF.Article

DYNAMICAL CORRELATION FUNCTIONS IN THE X-Y MODEL.PESCH W; MIKESKA HJ.1978; Z. PHYS. B; DEU; DA. 1978; VOL. 30; NO 2; PP. 177-182; BIBL. 12 REF.Article

GROUND STATE PROPERTIES OF THE S=1/2 HEISENBERG ANTIFERROMAGNET AND XY MAGNET IN THREE DIMENSIONSOITMAA J; BETTS DB.1978; PHYS. LETTERS, A; NLD; DA. 1978; VOL. 68; NO 5-6; PP. 450-452; BIBL. 7 REF.Article