Mao-cheng Cai, Xiaotie Deng, Wenan Zang. An Approximation Algorithm for Feedback Vertex Sets in Tournaments. SIAM Journal on Computing, 30(6):1993-2007, 2000. [doi]
@article{CaiDZ00:0,
title = {An Approximation Algorithm for Feedback Vertex Sets in Tournaments},
author = {Mao-cheng Cai and Xiaotie Deng and Wenan Zang},
year = {2000},
url = {http://epubs.siam.org/sam-bin/dbq/article/33816},
researchr = {https://researchr.org/publication/CaiDZ00%3A0},
cites = {0},
citedby = {0},
journal = {SIAM Journal on Computing},
volume = {30},
number = {6},
pages = {1993-2007},
}