@article{SM_1968_5_2_a3,
     author = {S. Kh. Aranson},
     title = {The absence of nonclosed {Poisson-stable} semitrajectories and trajectories doubly asymptotic to a double limit cycle for dynamical systems of the first degree of structural instability on orientable two-dimensional manifolds},
     journal = {Sbornik. Mathematics},
     pages = {205--219},
     publisher = {mathdoc},
     volume = {5},
     number = {2},
     year = {1968},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1968_5_2_a3/}
}