@article{SJL_1969___3_47_0,
     author = {Bogoliubov, N. N. and Khatset, B. I. and Petrina, D. Ya.},
     title = {Mathematical description of equilibrium state of classical systems based on the canonical formalism},
     journal = {S\'eminaire sur les \'equations aux d\'eriv\'ees partielles},
     pages = {47--73},
     year = {1969},
     publisher = {Coll\`ege de France},
     number = {3},
     language = {en},
     url = {https://www.numdam.org/item/SJL_1969___3_47_0/}
}