[26] Roger Jackson上揭文可以说是这类研究之首篇专题论文,尽管他文中所提出的观点后来受到了David Jackson的尖锐批评(详见后文),但他所作的这种尝试无疑是很有意义的。继续这种研究而做出了杰出贡献的是Ruegg先生,其代表作是,Buddha-nature,Mind and the Problem of Gradualism in a Comparative Perspective.Jordan Lectures,1987,London:School of Oriental and African Studies,University of London,1989.
[27] Per Kvaerne,“The Bon religion of Tibet:A survey of research”.The Buddhist Forum3(1991-1993),Papers in honour and appreciation of Professor David Seyfort Ruegg's Contribution to Indological,Buddhist and Tibetan Studies,ed.by Tadeusz Skorupsky,Ulrich Pagel,London:School of Oriental and African Studies,University of London,1994,pp.131-142.