@techreport{weko_164533_1, author = "Morihiro,Hayashida and Yue,Cao and Yang,Zhao", title = "Grammar-based Compression for Unrooted Trees and Subclass of Plane Graphs Using Integer Linear Programming", year = "2016", institution = "Institute for Chemical Research, Kyoto University, Institute for Chemical Research, Kyoto University, The National Institute of Advanced Industrial Science and Technology", number = "11", month = "jun" }