[MathOuvrage]
Approximate solution of operator equations
/ Krasnosel'skij, M. A. ; Vainikko, Gennadi M. ; Zabrejko, Petr P. ; Rutitskii, Ya. B. ; Stetsenko, V.Y. ; Ed. Louvish, D..
-Groningen : Wolters-Noordhoff, 1972. - xii, 484
[MathOuvrage]
Introduction to metamathematics
/ Kleene, Stephen C..
-Amsterdam, Groningen, New York : North-Holland;Wolters-Noordhoff, 1964. - x, 550 p. ; 23 cm