TY - JOUR TI - Special Issue Dedicated to Igor Vajda JO - Kybernetika PY - 2012 SP - 587 EP - 588 VL - 48 IS - 4 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/KYB_2012__48_4_a0/ LA - en ID - KYB_2012__48_4_a0 ER -