TY - JOUR AU - Kaczorek, Tadeusz TI - Some recent results in singular 2-D systems theory JO - Kybernetika PY - 1991 SP - 253 EP - 262 VL - 27 IS - 3 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/KYB_1991__27_3_a9/ LA - en ID - KYB_1991__27_3_a9 ER -