  By utilizing a two-dimensional extension of a very general series transform
given by Bailey, Exton [Indian J. pure appl. Math. 24 (6) (1993), 401-408]
deduced a very general double generating relation of a product of a pair of
Laguerre polynomials and obtained a number of useful relations with elementary
functions, Bessel functions, Hermite polynomials and single series expansions
of pairs of Laguerre polynomials. Unfortunately, some of the results given by
Exon contain errors and thus this is the aim of this short note to provide the
corrected form of these results.
