Warning message Node revision 628 not found in node Upper and low bounds of azimuthal numbers related to elementary wave functions of an elliptic cylinder . Perharps it was deleted. Pokornyi Yulii Vitaljevich RussiaVoronezh Voronezh State University, Russia, 394006, Voronezh, Universitetskaya pl., 1 Professorpokorny@math.vsu.ru Author's articles On Solvability of Certain Classes of Irregular the Second Order Variation Problems