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@article{DE_1975_11_6_a19, author = {Yu. V. Komlenko}, title = {A certain counterexample in the theory of positive solutions}, journal = {Differencialʹnye uravneni\^a}, pages = {1138}, publisher = {mathdoc}, volume = {11}, number = {6}, year = {1975}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1975_11_6_a19/} }
Yu. V. Komlenko. A certain counterexample in the theory of positive solutions. Differencialʹnye uravneniâ, Tome 11 (1975) no. 6. http://geodesic.mathdoc.fr/item/DE_1975_11_6_a19/