@article{10_4064_ap_44_2_209_218,
     author = {Wojciech Okrasi\'nski},
     title = {Non-negative solutions of some non-linear integral equations},
     journal = {Annales Polonici Mathematici},
     pages = {209--218},
     publisher = {mathdoc},
     volume = {44},
     number = {2},
     year = {1984},
     doi = {10.4064/ap-44-2-209-218},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/ap-44-2-209-218/}
}