TY - CHAP T1 - Poincaré, geometry and topology JF - Henri Poincaré: science et philosophie (Nancy, 1994) T3 - Publ. Henri-Poincaré-Arch. A1 - Stillwell,John PB - Akademie Verlag, Berlin PY - 1996 SP - 231–240, 580 ER -