AbstractGet full access to this articleView all access options for this article.Get accessReferences1. Ronkin G.M. Kauch. i Rezina, (3): 8 (2006).2. Ronkin G.M. Kauch. i Rezina, (5): 7 (2006).3. Ronkin G.M. Kauch. i Rezina, (5): 11 (2006).4. Andreasyan Yu.O. Kauch. i Rezina, (5): 6 (2002).5. Andreasyan Yu.O. Kauch. i Rezina, (6): 13 (2002).6. Livanova N.M. Vys. Soed., A49(1): 79 (2007).7. Livanova N.M. Vys. Soed., A49(3): 465 (2007).8. Livanova N.M. Kauch. i Rezina, (5): 13 (2007).