Chinese Journal of Applied Probability and Statistics. Yingyong Gailü Tongji (Chinese J. Appl. Probab. Statist.) (20060101), 22, no.~4, 410-418. ISSN: 1001-4268 (print).
Chinese Journal of Applied Probability and Statistics. Yingyong Gailü Tongji (Chinese J. Appl. Probab. Statist.) (20060101), 22, no.~2, 137-150. ISSN: 1001-4268 (print).
Chinese Journal of Applied Probability and Statistics. Yingyong Gailü Tongji (Chinese J. Appl. Probab. Statist.) (20050101), 21, no.~2, 161-168. ISSN: 1001-4268 (print).