1. Implicit functions, nonlinear integral equations, and the measure of noncompactness of the superposition operator;Appell;J. Math. Anal. Appl.,1981
2. Su alcuni parametri connesi con la misura di non compattezza di Hausdorff in spazi di functioni misurabili;Appell;Boll. Un. Mat. Ital. B (6),1984
3. Continuity properties of the superposition operator;Appell;Preprint Univ. Augsburg, No. 131,1987
4. On a class of nonlinear integral equations of convolution type;Askhabov;Differentsial'nye Uravneniya,1987
5. Wiener-Hopf integral equations with degenerating symbol;Babayan;Dokl. Akad. Nauk Armian. SSR,1981