@techreport{plt-tr2010-r5rs-v4.2.4,
  author = {PLT},
  title = {{R5RS}: Legacy Standard Language},
  number = {PLT-TR2010-r5rs-v4.2.4},
  type = {Reference Manual},
  institution = {PLT Scheme Inc.},
  month = {January},
  year = {2010},
  url = {http://download.plt-scheme.org/doc/4.2.4/pdf/r5rs.pdf},
  note = {\url{http://plt-scheme.org/techreports/};
          See also:
          Rickard Kelsey and William Clinger
          and Jonathan Rees (Editors)
          Revised$^5$ Report of the Algorithmic Language Scheme
          ACM SIGPLAN Notices
          33(9):26--76, 1998}
}