TY - JOUR TI - On some invariants preserved by isomorphisms of tables of marks JO - Revista colombiana de matematicas PY - 2009 SP - 165 EP - 174 VL - 43 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/RCM_2009_43_2_a5/ ID - RCM_2009_43_2_a5 ER -