@article{10_4153_CMB_1993_027_0,
     author = {Kaczynski, Tomasz and Krawcewicz, Wieslaw},
     title = {A {Local} {Hopf} {Bifurcation} {Theorem} for a {Certain} {Class} of {Implicit} {Differential} {Equations}},
     journal = {Canadian mathematical bulletin},
     pages = {183--189},
     year = {1993},
     volume = {36},
     number = {2},
     doi = {10.4153/CMB-1993-027-0},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1993-027-0/}
}