[1] ALTIN A.:
Solution of type $r^m$ for a class of singular equations. Internat. J. Math. Math. Sci. 5 (1982), 613-619.
MR 0669114
[2] ALTIN A.:
Some expansion formulas for a class of singular partial differential equations. Proc. Amer. Math. Soc. 85 (1982), 42-46.
MR 0647894 |
Zbl 0486.35018
[4] WEINSTEIN A.:
On a singular differential operator. Ann. Mat. Pura Appl. (4) 49 (1960), 359-365.
MR 0111921 |
Zbl 0094.06101