1. RADIAL SOLUTIONS FOR SOME CLASSES OF ELLIPTIC BOUNDARY VALUE PROBLEMS. Authors: RADU PRECUP, TOUFIK MOUSSAOUI.2. EXISTENCE OF SOLUTIONS FOR AN IMPULSIVE BOUNDARY VALUE PROBLEM WITH NONLINEAR DERIVATIVE DEPENDENCE ON UNBOUNDED INTERVALS VIA VARIATIONAL METHODS. Authors: SIHEM BOUMARAF, TOUFIK MOUSSAOUI.