@article{10_21136_CPM_1986_118266,
     author = {Mitropolsky, Ju. A. and Kulik, V. L.},
     title = {Investigation of invariant manifolds of dynamic systems by means of quadratic forms},
     journal = {\v{C}asopis pro p\v{e}stov\'an{\'\i} matematiky},
     pages = {70--77},
     publisher = {mathdoc},
     volume = {111},
     number = {1},
     year = {1986},
     doi = {10.21136/CPM.1986.118266},
     mrnumber = {833159},
     zbl = {0592.34032},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/CPM.1986.118266/}
}