TY - JOUR AU - Toparkus, Heinz TI - First-order systems of linear partial differential equations: normal forms, canonical systems, transform methods JO - Annales Universitatis Paedagogicae Cracoviensis. Studia Mathematica PY - 2014 IS - 13 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/AUPCM_2014_13_a2/ LA - en ID - AUPCM_2014_13_a2 ER -