S. Ozcan and E. Oztekin, (J. Math. Chem. doi: 10.1007/s10910-008-9398-z) published formulas for evaluating the two-center nuclear attraction integrals over Slater type orbitals. It is shown that the analytical relations for these integrals through the expansion coefficients of the electron charge density for the one-center case and the overlap integrals presented in Sect. 3 of this work can easily be derived by means of a simple algebra from the formulas published in our papers (I.I. Guseinov, J Mol Struct (Theochem) 417: 117, 1997; J Math Chem 42: 415, 2007 and B. A. Mamedov, Chin J Chem 22: 545, 2004). It should be noted that the formulas of overlap integrals presented by E. Oztekin et al., in previous paper (E. Oztekin, M. Yavuz,, S. Atalay, J Mol Struct (Theochem) 544: 69, 2001) for the calculation of two-center nuclear attraction integrals also are obtained from our papers (see Comment: I.I. Guseinov, J Mol Struct (Theochem) 638: 235, 2003).