@book{gray:2000:ldg,
    author = {Gray, Jeremy J.},
     title = {Linear Differential Equations and Group Theory from {R}iemann
              to {P}oincar\'e},
   edition = {2nd},
 publisher = {Birkh\"auser Boston Inc.},
   address = {Boston, MA},
      year = {2000},
     pages = {xx+338},
      isbn = {0-8176-3837-7},
   mrclass = {34-03 (14-03 20-03 30E25 33-03 34Mxx)},
  mrnumber = {MR1751835 (2000m:34002)},
     zblno = {0949.01001}}