@book{olver:1993:alg,
    author = {Olver, Peter J.},
     title = {Applications of {L}ie Groups to Differential Equations},
    series = {Graduate Texts in Mathematics},
    volume = {107},
   edition = {2nd},
 publisher = {Springer-Verlag},
   address = {New York},
      year = {1993},
     pages = {xxviii+513},
      isbn = {0-387-94007-3; 0-387-95000-1},
   mrclass = {58G35 (22E60 35A30 58F05 58F07)},
  mrnumber = {MR1240056 (94g:58260)},
     zblno = {0785.58003}}