TY - BOOK T1 - Linear differential equations and group theory from Riemann to Poincaré A1 - Gray,Jeremy J. PB - Birkhäuser Boston, Inc., Boston, MA PY - 1986 SN - 0-8176-3318-9 UR - http://dx.doi.org/10.1007/978-1-4899-6672-8 ER -