“…Historically it started with the classical theorem of Hartogs [6] in 1906. Then many versions and generalizations of this property were considered in complex analysis, algebraic geometry and partial differential equations, see, for instance, Ehrenpreis [5], Kohn and Rossi [9], Ivashkovich [8], Laurent-Thiebaut [11], Harvey and Lawson [7], Dolbeault and Henkin [2], Sarkis [12,13], Andreotti and Hill [1], Dwilewicz [3], Dwilewicz and Merker [4] and many others.…”