@article{INTM_1966_a0,
     author = {M. M. Vainberg and P. G. Aizengendler},
     title = {Methods of investigation in the theory of branching of solutions},
     journal = {Itogi nauki i tehniki. Seri\^a, Matemati\v{c}eskij analiz},
     pages = {7--69},
     publisher = {mathdoc},
     year = {1966},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/INTM_1966_a0/}
}