@article{SM_1968_6_3_a6,
     author = {L. P. Shilnikov},
     title = {On the generation of a periodic motion from trajectories doubly asymptotic to an equilibrium state of saddle type},
     journal = {Sbornik. Mathematics},
     pages = {427--438},
     publisher = {mathdoc},
     volume = {6},
     number = {3},
     year = {1968},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1968_6_3_a6/}
}