TY - JOUR AU - Zelinka, Bohdan TI - On signed edge domination numbers of trees JO - Mathematica Bohemica PY - 2002 SP - 49 EP - 55 VL - 127 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.21136/MB.2002.133984/ DO - 10.21136/MB.2002.133984 LA - en ID - 10_21136_MB_2002_133984 ER -