Solutions of type r m for a class of singular equations. Altin, Abdullah — 1982 International Journal of Mathematics and Mathematical Sciences
Radial type solutions for a class of third order equations and their iterates Abdullah Altin — 1999 Mathematica Slovaca
Some solutions for a class of singular equations Abdullah Altin; Ayşegül Erençin — 2004 Czechoslovak Mathematical Journal In this paper we obtain all solutions which depend only on r for a class of partial differential equations of higher order with singular coefficients.