南京林业大学学报（自然科学版）
CONCERNING THE PROOF OF A THEOREM OF DISCRETE PHENOMENA IN THE CAUCHY PROBLEM
Yang Qiyu
JOURNAL OF NANJING FORESTRY UNIVERSITY . 1982, (02): 139 -142 .  DOI: 10.3969/j.jssn.1000-2006.1982.02.013

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