Institution: | 1.Laboratory of Biophysics, Department of Physics, Faculty of Science, University of Yaounde I, P.O. Box 812, Yaoundé, Cameroon ;2.The Abdus Salam International Centre for Theoretical Physics, P.O. Box 538, Strada costiera 11, 34014, Trieste, Italy ;3.Laboratory of Mechanics, Department of Physics, Faculty of Science, University of Yaounde I, P.O. Box 812, Yaounde, Cameroon ; |