TY - JOUR AU - Drábek, Pavel TI - Two notions which affected nonlinear analysis (Bernard Bolzano lecture) JO - Mathematica Bohemica PY - 2014 SP - 699 EP - 711 VL - 139 IS - 4 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.21136/MB.2014.144146/ DO - 10.21136/MB.2014.144146 LA - en ID - 10_21136_MB_2014_144146 ER -