TY  - JOUR
AU  - R. Romano
TI  - Study of L(r, s)-colourings for Caterpillars and for Trees
JO  - Mathematica balkanica
PY  - 2000
SP  - 59
VL  - 14
IS  - 1-2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MABA_2000_14_1-2_a4/
ID  - MABA_2000_14_1-2_a4
ER  -