A further discussion on Galambos problem. Shen, Lu-ming; Liu, Yue-hua; Zhou, Yu-yuan — 2007 Acta Mathematica Academiae Paedagogicae Nyí regyháziensis. New Series [electronic only]
A further discussion of the Hausdorff dimension in Engel expansions Lu-ming Shen — 2010 Acta Arithmetica