@article{AIHPA_1968__9_2_109_0,
     author = {Chernikov, N. A. and Tagirov, E. A.},
     title = {Quantum theory of scalar field in de {Sitter} space-time},
     journal = {Annales de l'institut Henri Poincar\'e. Section A, Physique Th\'eorique},
     pages = {109--141},
     publisher = {Gauthier-Villars},
     volume = {9},
     number = {2},
     year = {1968},
     mrnumber = {270704},
     zbl = {0162.57802},
     language = {en},
     url = {http://www.numdam.org/item/AIHPA_1968__9_2_109_0/}
}