6SWALES J M,FEAK C B.Academic writing for graduate students[M].Michigan:University of Michigan Press,1994.
7LEWISON G,HARLEY J.What’s in a titleNumbers of words and presence of colons[J].Scientometrics,2005,63:341-356.
8HARTLEY J.There’s more to the titles than meets the eye:exploring the possibilities[J].J Tech Writing&Comm,2007,37:95-101.
9SCHULTZ D M.Eloquent science:A practical guide to becoming a better writer,speaker,and atmospheric scientist[M].Washington:American Meteorological Society,2009:24-25.
10HARTLEY J.Planning that title:practice and preferences for titles with colons in academic titles[J].Library&Info Sci Res,2007,29(4):553–568.