@article{GDZPPN002181177,
title = {On solutions of the generalized bi-axially symmetric Helmholtz equation generated by integral operators.},
journal = {Journal f\"ur die reine und angewandte Mathematik},
volume = {218},
year = {1965},
pages = {109-120},
zbl = {0135.32003},
url = {http://dml.mathdoc.fr/item/GDZPPN002181177}
}
Gilbert, R.P.; Howard, H.C. On solutions of the generalized bi-axially symmetric Helmholtz equation generated by integral operators.. Journal für die reine und angewandte Mathematik, Tome 218 (1965) pp. 109-120. http://gdmltest.u-ga.fr/item/GDZPPN002181177/