http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Infinite dimensional lie algebras and quantum field theory
proceedings of the Varna summer school 1987
Institut za i͡adreni izsledvanii͡a i i͡adrena energetika (Bŭlgarska akademii͡a na naukite)
Arnold-Sommerfeld-Institut für Mathematische Physik
H.D. Doebner, J.D. Hennig, T.D. Palev.
Organized by the Institute of Nuclear Research and Nuclear Energy (INRE), Bulgarian Academy of Sciences, Sofia and Arnold Sommerfeld Institute for Mathematical Physics (ASI), Technical University of Clausthal, Germany F.R.