“…For the mathematical analysis of this type of problem, various methods and elaborate techniques have been proposed, see for example Mesbahi et al [1], [2], [16], [15], Gontara [9], Lions [10], Maâgli et al [13], [12], Pierre [17] and Zhang [20], [19]. We refer the reader to Arakelian and Gauthier [3], Armitage and Gardiner [4] and Port [18] for more details on the potential arguments of the theory that interest us mainly in this work.…”