Address: Markusa st. 22, Vladikavkaz,
362027, RNO-A, Russia
Phone: (8672)50-18-06
E-mail: rio@smath.ru
Full name: Danchev Peter V.
Work place: Plovdiv State University "Paissii Hilendarski"
Position: Professor
Work address: 24 Tzar Assen Street, 4000 Plovdiv, Bulgaria
E-mail: pvdanchev@yahoo.com