Yang, Xiangqun; Liu, Liangxin Two-parameter random walks. (Chinese) Zbl 0900.60082 Acta Math. Sci. (Chin. Ed.) 15, No. 4, 361-367 (1995). Cited in 1 Document MSC: 60G50 Sums of independent random variables; random walks PDFBibTeX XMLCite \textit{X. Yang} and \textit{L. Liu}, Acta Math. Sci. (Chin. Ed.) 15, No. 4, 361--367 (1995; Zbl 0900.60082)