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MR 0257776[2] L. P. BELLUCE W. A. KIRK: 
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MR 0250148[3] Ju. G. BORISOVIČ, Ju. I. SAPRONOV: On topological theory of compactly restrictable mappings. Trudy Sem. Funkc. Anal. 12 (1969), 43-68.
[4] F. E. BROWDER: 
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MR 0230179 | 
Zbl 0164.44801[5] F. E. BROWDER W. V. PETRYSHYN: 
The solution by iteration of non-linear functional equations in Banach spaces. Ibid., 72 (1966), 571-575. 
MR 0190745[6] J. DANEŠ: Nonlinear operators and functionals. (Thesis). Charles University, Faculty of Mathematics and Physics, Prague, 1968 (Czech).
[7] J. DANEŠ: 
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MR 0235435[8] J. DANEŠ: Generalized concentrative mappings. Summer School on Fixed Points, Krkonoše, Czechoslovakia, Aug. 31 - Sept. 6 1969.
[9] J. DANEŠ: 
Generalized concentrative mappings and their fixed points. Comment. Math. Univ. Carolinae 11 (1970), 115-136. 
MR 0263063[10] J. DANEŠ: 
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MR 0283647[12] W. A. KIRK: 
On nonlinear mappings of strongly semicontractive type. Journ. Math. Anal. Appl. 37 (1969), 409-412. 
MR 0244814 | 
Zbl 0183.15103[13] W. A. KIRK: 
Nonexpansive mappings and the weak closure of sequences of iterates. Duke Math. Journ. 36 (1969), 639-645. 
MR 0248579 | 
Zbl 0185.39501[14] B. N. SADOVSKII: 
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MR 0211302[15] B. N. SADOVSKII: 
On measures of non-compactness and concentrative operators. Problemy Mat. Analiza Slož. Sistem 2 (1968), 89-119. 
MR 0301582[16] M. M. VAINBERG: 
Variational methods for the study of nonlinear operators. Holden-Day, San Francisco, Calif., 1964. 
MR 0176364 | 
Zbl 0122.35501