@article{EXMATH_1989__4_3_38335,
     author = {W. Okrasinski},
     title = {Nontrivial solutions to nonlinear {Volterra} equations},
     journal = {Extracta Mathematicae},
     pages = {151},
     publisher = {mathdoc},
     volume = {4},
     number = {3},
     year = {1989},
     language = {en},
     url = {https://geodesic-test.mathdoc.fr/item/EXMATH_1989__4_3_38335/}
}