[[1] G. Baran, Cavitation, Course of the Polytechnic Institute Bucharest, 1994.]Search in Google Scholar
[[2] L. Burlacu, Analytical Mathematics, Bucharest, 1983.]Search in Google Scholar
[[3] C. Iacob, Classical and modern mathematics, vol. IV, Bucharest, 1984.]Search in Google Scholar
[[4] I. Anton, Cavitation, vol. I and II, Academy Publishing, Bucharest, 1980.]Search in Google Scholar
[[5] V. Teodorescu, Equations of mathematical physics, Course of the University of Bucharest, 1982.]Search in Google Scholar
