Zhijian WeiLihong HuangSihu HuConvergence of discrete analogues of a generalization of J.R. Haddock's conjecture.1395-1398200619Appl. Math. Lett.12https://doi.org/10.1016/j.aml.2006.02.010https://www.wikidata.org/entity/Q123027663db/journals/appml/appml19.html#WeiHH06