TY  - JOUR
AU  - Nguyen, Viet Hung
TI  - Approximation algorithms for metric tree cover and generalized tour and tree covers
JO  - RAIRO - Operations Research - Recherche Opérationnelle
PY  - 2007
SP  - 305
EP  - 315
VL  - 41
IS  - 3
PB  - EDP-Sciences
UR  - http://www.numdam.org/articles/10.1051/ro:2007025/
DO  - 10.1051/ro:2007025
LA  - en
ID  - RO_2007__41_3_305_0
ER  -