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@article{IVM_1963_6_a7, author = {I. V. Zuev}, title = {On circular integral curves of the equation $f(x,y,y')=0$}, journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika}, pages = {64--71}, publisher = {mathdoc}, number = {6}, year = {1963}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/IVM_1963_6_a7/} }
I. V. Zuev. On circular integral curves of the equation $f(x,y,y')=0$. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 6 (1963), pp. 64-71. http://geodesic.mathdoc.fr/item/IVM_1963_6_a7/