@article{10_4064_ap_50_2_129_136,
     author = {Jolanta Przybycin},
     title = {The connection between number and form of bifurcation points and properties of the nonlinear perturbation of {Berestycki} type},
     journal = {Annales Polonici Mathematici},
     pages = {129--136},
     publisher = {mathdoc},
     volume = {50},
     number = {2},
     year = {1989},
     doi = {10.4064/ap-50-2-129-136},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/ap-50-2-129-136/}
}