1. Seising R.: The Fuzzification of Systems. The Genesis of Fuzzy Set Theory and Its Initial ApplicationsDevelopments up to the 1970s. Springer, Berlin (2007). A history of Fuzzy Set Theory and the ways it was first used. The book incorporates this genesis of the new theory into the history of 20th century science and technology. Influences from philosophy, system theory and cybernetics stemming from the earliest part of the 20th century are considered alongside those of communication and control theory from mid-century
2. Zadeh, L.A., Desoer, C.A.: Linear System Theory: The State Space Approach. McGraw-Hill, New York (1963). This textbook for engineers in research and development and applied mathematicians is landmark in the development of the state space approach. It concerns the technique’s application to systems described by differential equations
3. Zadeh, L.A., Polak, E.: System Theory, Bombay. McGraw-Hill, New Delhi (1969). This vol. 8 in the Inter-University electronics series is a collection of papers on system theory
4. Zadeh L.A.: The Concept of State in System Theory, in [3, p. 9–42]. In this book chapter Zadeh presented the “state space approach” to System Theory
5. Zadeh L.A.: System theory. Columbia Eng. Q., 16–19, 34 (1954). Zadeh’s first paper on System theory in the New York student publication Columbia Engineering Quarterly