摘要：Liu et al.(2016)published the paper entitled"Past, current and future of biomass energy research: A bibliometric analysis". The same paper was also published by Liu et al. (2015)in BioTechnology: An Indian Journal.It is not appropriate to publish the same paper in two journals. One of the most important reasons is that more senior researchers are needed to be reviewers for the same manuscript. In Section MATERIALS AND METHOD,authors applied almost parts from published papers(Li and Ho, 2008; Han and Ho,2011)without citing appropriate references.
