TY  - JOUR
AU  - Nobuaki Obata
TI  - Positive $Q$-matrices of graphs
JO  - Studia Mathematica
PY  - 2007
SP  - 81
EP  - 97
VL  - 179
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.4064/sm179-1-7/
DO  - 10.4064/sm179-1-7
LA  - en
ID  - 10_4064_sm179_1_7
ER  -