[1] F. E. BROWDER: 
Nonlinear mappings of nonexpansive and accretive type in Banach space. Bull. Amer. Math. Soc. 73 (1967), 875-881. 
MR 0232255 
[2] F. E. BROWDER: 
Semicontractive and semiaccretive nonlinear mappings in  Banach spaces. Bull. Amer. Math. Soc. 74 (1968), 660-665. 
MR 0230179 | 
Zbl 0164.44801 
[4] J. A. GATICA W. A. KIRK: 
Fixed point theorems for contraction mappings with nonexpansive and pseudocontractive mappings. Rocky Mountain J. Math. 4 (1974), 69-79. 
MR 0331136 
[5] T. KATO: 
Nonlinear semigroup and evolution equations. J. Math. Soc. Japan 19 (1967), 508-520. 
MR 0226230 
[6] W. A. KIRK: 
Remarks on pseudo-contractive mappings. Proc. Amer. Math. Soc. 25 (1970), 820-823. 
MR 0264481 | 
Zbl 0203.14603 
[7] W. A. KIRK C. MORALES: 
Condensing mappings and the Leray-Schauder boundary condition. J. Nonlinear Analysis (to appear). 
MR 0537339 
[8] W. A. KIRK R. SCHÖNEBERG: 
Some results on pseudo-contractive mappings. Pacific J. Math. 71 (1977), 98-100. 
MR 0487615 
[9] R. H. MARTIN: 
Differential equations on closed subset of a Banach space. Trans. Amer. Math. Soc. 179 (1973), 399-414. 
MR 0318991 
[10] G. MÜLLER J. REINERMANN: 
Fixed point theorems for pseudo-contractive mappings and a counterexample for compact maps. Comment. Math. Univ. Carolinae 18 (1977), 281-298. 
MR 0448173 
[11] R. D. NUSSBAUM: The fixed point index and fixed point theorems for k-set-contractions. Ph.D. Thesis, University of Chicago, Chicago, III., 1969.
[12] W. V. PETRYSHYN: 
Structure of the fixed point sets of $k$-set-contractions. Arch. Rat. Mech. Anal. 40 (1971), 312-328. 
MR 0273480 
[13] W. V. PETRYSHYN: 
Fixed point theorems for various classes of $1$-set-contractive and $1$-ball-contractive mappings in Banach spaces. Trans. Amer. Math. Soc. 182 (1973), 323-352. 
MR 0328688 | 
Zbl 0277.47033 
[14] R. SCHÖNEBERG: Fixpunktsätze für einige Klassen kontraktionsartiger Operatoren in Banachräumen über einen Fixpunktindex, eine Zentrumsmethode und Fixpunkttheorie nichtexpansiver Abbildungen. Ph.D. Thesis, RWTH Aachen, 1977.