“…In study [1], the authors characterize the pattern equation method (PEM) and note that certain aspects of the PEM were applied in [2][3][4]. 1 This characterization does not raise objections to the analysis presented in studies [3] and [4], which were published substantially later than [5], the first study on the PEM. The presence of a reference to study [2], which was ignored by the author of the PEM in his previous studies on this method, can be regarded favorably.…”