In a recent paper, Plank presents results on first integrals for the Lotka-Volterra system (LVS) and their use as possible Hamiltonians. Since he was not acquainted with already published results, we feel that an embedding of his results in those of previous papers can clarify some of his statements. We concentrate our comments on the results presented in his paragraphs III and IV. (C) 1996 American Institute of Physics.
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Harbin Inst Technol, Dept Math, Weihai 264209, Peoples R ChinaHarbin Inst Technol, Dept Math, Weihai 264209, Peoples R China
Zou, Xiaoling
Wang, Ke
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Harbin Inst Technol, Dept Math, Weihai 264209, Peoples R China
NE Normal Univ, Sch Math & Stat, Changchun 130024, Peoples R ChinaHarbin Inst Technol, Dept Math, Weihai 264209, Peoples R China