@article{AIHPA_1978__28_1_75_0,
     author = {Golo, V. L. and Monastyrsky, M. I.},
     title = {Gauge groups and topological invariants of vacuum manifolds},
     journal = {Annales de l'institut Henri Poincar\'e. Section A, Physique Th\'eorique},
     pages = {75--89},
     publisher = {Gauthier-Villars},
     volume = {28},
     number = {1},
     year = {1978},
     mrnumber = {475496},
     zbl = {0384.57019},
     language = {en},
     url = {http://www.numdam.org/item/AIHPA_1978__28_1_75_0/}
}