@article{SM_1968_5_1_a0,
     author = {F. A. Berezin},
     title = {On a model for quantum field theory},
     journal = {Sbornik. Mathematics},
     pages = {1--23},
     year = {1968},
     volume = {5},
     number = {1},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1968_5_1_a0/}
}