TY - JOUR AU - Chrastina, Jan TI - Examples from the calculus of variations. III. Legendre and Jacobi conditions JO - Mathematica Bohemica PY - 2001 SP - 93 EP - 111 VL - 126 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.21136/MB.2001.133926/ DO - 10.21136/MB.2001.133926 LA - en ID - 10_21136_MB_2001_133926 ER -