EL-SAFTY, A. ON THE NUMERICAL SOLUTION OF RETARDED ORDINARY DIFFERENTIAL EQUATIONS BY A CLASS OF FORMULAE BASED ON SPLINE FUNCTION APPROXIMATION. Periodica Polytechnica Electrical Engineering, [S. l.], v. 27, n. 2, p. 123–134, 1983. Disponível em: https://pp.bme.hu/ee/article/view/4712. Acesso em: 9 may. 2024.