@unpublished{macdonald:1990:hf,
    author = {Macdonald, I. G.},
     title = {Hypergeometric Functions},
      note = {Unpublished Lecture Notes, University of London. An online version exists.},
     links = {\URL[FullText]{http://www.stat.psu.edu/~richards/macdonald.pdf}},
      year = {1990}}