  Recently published formulas for the surface and regular solid spherical
harmonics and for the expansion of the product of two normalized associated
Legendre functions with different centers in ellipsoidal coordinates (Telhat
Ozdogan, Metin Orbay, Czech.J.Phys., 52(2002)1297) are critically analyzed. It
is demonstrated that the presented in this work formulas are not original and
they are available in the literature or can easily be obtained from the
published in the literature formulas by changing the summation indices.
