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Classification of two-dimensional positive random walks and almost linear semimartingales. (English. Russian original) Zbl 0246.60055
Sov. Math., Dokl. 13, 136-139 (1972); translation from Dokl. Akad. Nauk SSSR 202, 526-528 (1972).

MSC:
60G50 Sums of independent random variables; random walks
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