@techreport{oai:tsukuba.repo.nii.ac.jp:00028285,
 author = {IGARASHI, Ayumi and YAMAMOTO, Yoshitsugu and 山本, 芳嗣},
 month = {Nov},
 note = {In this paper we prove that calculating the average covering tree value
recently proposed as a single-valued solution of graph games is #P-complete.},
 title = {Computational Complexity of the Average Covering Tree Value},
 year = {2012}
}