Bairamov Ismihan2023-06-162023-06-1620130167-7152https://doi.org/10.1016/j.spl.2012.08.014https://hdl.handle.net/20.500.14365/1456Lemma 2 in the paper (page 1803) requires an additional condition and without this condition may not be true. We correct this lemma and consequently the conditions of Corollary 2 and Theorem 3. (C) 2012 Elsevier B.V. All rights reserved.eninfo:eu-repo/semantics/closedAccessCorrection10.1016/j.spl.2012.08.0142-s2.0-84866284112