Matheson, T.; S. Jha; P. Challis; R. Kirshner. Circular No. 7903. Central Bureau for Astronomical Telegrams. 2002-05-17 [2011-07-05]. (原始内容存档于2012-05-01).引文使用过时参数coauthors (帮助)
Wood-Vasey, W. M.; Aldering, G.; Nugent, P. Circular No. 7902. Central Bureau for Astronomical Telegrams. 2002-05-17 [2011-07-05]. (原始内容存档于2012-05-01).引文使用过时参数coauthors (帮助)