[en] Distribution of stress and displacement in structures containing crack-like flaws exhibit three-dimensional nature as well as crack tip stress concentration. Among all the approximate methods in solving these types of problems, the method of line is probably the least known. The Method of Line (MOL) is a method that tends to keep the advantages and discards the disadvantages of both the analytical and grid methods of integration. The idea is to substitute the deriatives with respect to some, but not all, independent variables by finite differences. This approach replaces a given differential equation by a system of differential equations with lower number of independent variables. (Auth.)