@phdthesis{oai:tsukuba.repo.nii.ac.jp:00027974,
 author = {高橋, 一喜},
 month = {},
 note = {2011, Includes bibliographical references (p. 69-72)},
 school = {筑波大学, University of Tsukuba},
 title = {Development and analysis of mathematical models for assessing impact of three key changes in Japanese city gas industry},
 year = {2012}
}