TY - JOUR AU - Paweł Walczak TI - Jacobi operator for leaf geodesics JO - Colloquium Mathematicum PY - 1993 SP - 213 EP - 226 VL - 65 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.4064/cm-65-2-213-226/ DO - 10.4064/cm-65-2-213-226 LA - en ID - 10_4064_cm_65_2_213_226 ER -