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@article{PIM_1977_N_S_22_36_a17, author = {Vlajko Lj. Koci\'c}, title = {Some {Examples} {For} {Nonlinear} {Superposition}}, journal = {Publications de l'Institut Math\'ematique}, pages = {139 }, publisher = {mathdoc}, volume = {_N_S_22}, number = {36}, year = {1977}, url = {http://geodesic.mathdoc.fr/item/PIM_1977_N_S_22_36_a17/} }
Vlajko Lj. Kocić. Some Examples For Nonlinear Superposition. Publications de l'Institut Mathématique, _N_S_22 (1977) no. 36, p. 139 . http://geodesic.mathdoc.fr/item/PIM_1977_N_S_22_36_a17/