PROJECTIVE REPRESENTATIONS OF SPACE GROUPS .2. FACTOR SYSTEMS

[1] SEMIDIRECT PRODUCTS AND POINT GROUPS [J]. REVIEWS OF MODERN PHYSICS, 1963, 35 (03) : 641 - &

[2] PROJECTIVE REPRESENTATIONS OF SPACE GROUPS, .1. TRANSLATION GROUPS [J]. QUARTERLY JOURNAL OF MATHEMATICS, 1970, 21 (82) : 203 - +

[3] ON UNITARY RAY REPRESENTATIONS OF CONTINUOUS GROUPS [J]. ANNALS OF MATHEMATICS, 1954, 59 (01) : 1 - 46

[4] RAY REPRESENTATIONS OF POINT GROUPS AND IRREDUCIBLE REPRESENTATIONS OF SPACE GROUPS AND DOUBLE SPACE GROUPS [J]. PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY OF LONDON SERIES A-MATHEMATICAL AND PHYSICAL SCIENCES, 1966, 260 (1108) : 1 - &

[5] UNITARY REPRESENTATIONS OF GROUP EXTENSIONS .1. [J]. ACTA MATHEMATICA, 1958, 99 (3-4) : 265 - 311

[6] Schur I., 1907, J REINE ANGEW MATH, V132, P85

[1] SEMIDIRECT PRODUCTS AND POINT GROUPS [J]. REVIEWS OF MODERN PHYSICS, 1963, 35 (03) : 641 - &

[2] PROJECTIVE REPRESENTATIONS OF SPACE GROUPS, .1. TRANSLATION GROUPS [J]. QUARTERLY JOURNAL OF MATHEMATICS, 1970, 21 (82) : 203 - +

[3] ON UNITARY RAY REPRESENTATIONS OF CONTINUOUS GROUPS [J]. ANNALS OF MATHEMATICS, 1954, 59 (01) : 1 - 46

[4] RAY REPRESENTATIONS OF POINT GROUPS AND IRREDUCIBLE REPRESENTATIONS OF SPACE GROUPS AND DOUBLE SPACE GROUPS [J]. PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY OF LONDON SERIES A-MATHEMATICAL AND PHYSICAL SCIENCES, 1966, 260 (1108) : 1 - &

[5] UNITARY REPRESENTATIONS OF GROUP EXTENSIONS .1. [J]. ACTA MATHEMATICA, 1958, 99 (3-4) : 265 - 311

[6] Schur I., 1907, J REINE ANGEW MATH, V132, P85