@article{DAN_1989_309_2_a6,
     author = {V. A. Trenogin and N. A. Sidorov and B. V. Loginov},
     title = {The bifurcation equation: potentiality, bifurcation, symmetry},
     journal = {Doklady Akademii Nauk},
     pages = {286--289},
     year = {1989},
     volume = {309},
     number = {2},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1989_309_2_a6/}
}