@article{10_4064_ap_22_1_73_87,
     author = {M. Kwapisz},
     title = {On the convergence of approximate iterations for an abstract equation},
     journal = {Annales Polonici Mathematici},
     pages = {73--87},
     publisher = {mathdoc},
     volume = {22},
     number = {1},
     year = {1969},
     doi = {10.4064/ap-22-1-73-87},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/ap-22-1-73-87/}
}