@article{MAN_1971__192_162158,
     author = {C.A. STUART},
     title = {Positive {Solutions} of a {Nonlinear} {Integral} {Equation.}},
     journal = {Mathematische Annalen},
     pages = {119--124},
     publisher = {mathdoc},
     volume = {192},
     year = {1971},
     zbl = {0203.42101},
     url = {http://geodesic.mathdoc.fr/item/MAN_1971__192_162158/}
}