Pyatnitskij, E. S. Absolute Stabilität nichtlinearer Impulssysteme mit einer instationären Nichtlinearität. (Russian) Zbl 0197.42201 Avtom. Telemekh. 1970, No. 8, 50-58 (1970). PDFBibTeX XMLCite \textit{E. S. Pyatnitskij}, Avtom. Telemekh. 1970, No. 8, 50--58 (1970; Zbl 0197.42201)
Pyatnitskij, E. S. New research on the absolute stability of automatic control systems (Review). (Russian) Zbl 0172.12506 Avtom. Telemekh. 1968, No. 6, 5-36 (1968). PDFBibTeX XMLCite \textit{E. S. Pyatnitskij}, Avtom. Telemekh. 1968, No. 6, 5--36 (1968; Zbl 0172.12506)
Pyatnitskij, E. S. New research on absolute stability of automatic control systems. (Survey.). (Russian) Zbl 0157.15802 Avtom. Telemekh. 1968, No. 6, 5-36 (1968). PDFBibTeX XMLCite \textit{E. S. Pyatnitskij}, Avtom. Telemekh. 1968, No. 6, 5--36 (1968; Zbl 0157.15802)
Braverman, Eh. M.; Pyatnitskij, E. S. Estimation of the rate of convergence of algorithms based on the potential functions method. (Russian) Zbl 0201.47304 Avtom. Telemekh. 1966, No. 1, 95-112 (1966). PDFBibTeX XMLCite \textit{Eh. M. Braverman} and \textit{E. S. Pyatnitskij}, Avtom. Telemekh. 1966, No. 1, 95--112 (1966; Zbl 0201.47304)