[1] J. L. Lions: 
Quelques méthodes de résolution des problémes aux limites non linéaires. Dunod Gauthier-Villars, Paris, 1969. 
MR 0259693 | 
Zbl 0189.40603 
[3] F. E. Browder: 
Existence theorems for nonlinear partial differential equations, Global analysis. Proc. Symp. Pure Math. Vol. 16, Amer. Math. Soc. (1970), 1 - 60. 
MR 0269962 
[4] H. Brézis: 
Monotonicity methods in Hilbert spaces and some applications to nonlinear partial differential equations, Contributions to Nonlinear Functional Analysis. E. Zarantonello ed. Acad. Press (1971). 
MR 0394323 
[5] V. Barbu: Semi-groups of nonlinear contractions in Banach spaces. (Rumanian), Academia, Bucharest, 1974.
[6] H. Brézis: Opérateurs maximaux monotones et semigroups de contractions dans les espaces de Hilbert. Math. Studies, 5, North Holland, (1973).
[7] H. Gajewski K. Gröger K., Zacharias: 
Theorie der nichtlinearen Operatoren und Differentialgleichungen. Academia-Verlag, Berlin, 1974. 
MR 0636412 
[8] J. Kačur: 
Method of Rothe and nonlinear parabolic boundary value problems of arbitrary order I, II. Czechoslovak Math. J., to appear. 
MR 0506431 
[9] J. Nečas: 
Application of Rothe's method to abstract parabolic equations. Czechoslovak Math. J., 
Zbl 0311.35059 
[10] J. Kačur: 
Applications of Rothe's method to nonlinear evolution equations. Mat. Časopis Sloven. Akad. Vied, 25, (1975), N-1, 63-81. 
MR 0394344 
[12] J. A. Dubinskij: 
Quasilinear elliptic and parabolic equations of arbitrary order. (Russian), Uspehi Mat. Nauk, 23, 1 (1968), 45-90. 
MR 0228826 | 
Zbl 0162.42303 
[14] M. A. Krasnoselskij: Topological methods in the theory of nonlinear integral equations. Pergamon Press, New York, 1964.
[15] K. Yosida: 
Functional Analysis. Springer, Berlin-Heidelberg-New York, 1969. 
MR 0500055