by Grechnev, V.V., Zandanov, V.G., Uralov, A.M., Maksimov, V.P., Borovik, V.N., Gelfreikh, G.B., Grigorieva, I.Y., Medar, V.G., Korzhavin, A.N.
Published in Proceedings of the International Astronomical Union (01.06.2004)