Authors: KHATER AH CALLEBAUT DK RAMADY AG ABDULAZIZ SF

Citation: Ah. Khater et al., ON THE INVARIANT VARIATIONAL PRINCIPLE FOR STURM-LIOUVILLE EQUATION, LINEAR AND NONLINEAR DIRAC SYSTEM, Nuovo cimento della Società Italiana di Fisica. A. Nuclei, particles and fields, 110(11), 1997, pp. 1297-1311