1. Characteristics of distributed parameter-systems;Butkovskij,1979
2. Approximations theorie Tschebyscheffsche Approximation mit Anwendungen;Collatz,1973
3. Introduction to Theory of uniform Aproximation Functions by Polynomials;Dziadyk,1977
4. Synthesis of Adaptive Control Systems by Function Space Methods;Hsieh,1965
5. Contribution to The Theory of Distributed Parameter Systems by generalized models, adaptive control;Hulkó,1977