-
[1]
. Boucher W,Friedan D,Kent A.Phys.Lett.,1986,B172:316—321 2. Dixon L,Ginsparg P,Harvey J.Nucl.Phys.,1988,B306:470—4963. Dixon L et al.Nucl.Phys.,1987,B282:13—73 4. Dixon L.Some world-sheet properties of super string compactifications on orbifolds and otherwise.Lectures given at the 1987 ICTP summer workshop in High Energy Physics and Cosmology.Trieste,Italy,June29—Aug.7,1987 5. Dixon L et al.Nucl.Phys.,1985,B261:678—6866. Dixon L et al.Nucl.Phys.,1986,B274:285—314 7. Dulat S.J .Phys.,2000,A33:53458. Dulat S,Wendland K.Crystallographic Orbifolds:Towards a classifica-tion of unitary conformal field theories with central charge c=2,JHEP 0006:012,2000 9. Philippe Di Francesco,Pierre Mathieu,David Senchal.Conformal field theory.Springer Verlag,NewYork,1997,352—354 10. Ginsparg P.Applied conformal field theory.Lectures given at Les Houches Summer School in Theoretical Physics.Les Houches,France,June 28—Aug.5,1988.Published in Les Houches Summer School 1988,1—168 11. Narain K S.Phys.Lett.,1986,B169:41—46 12. Schwimmer A,Seiberg N.Phys.Lett.,1987,B184:191—196