@phdthesis{oai:tsukuba.repo.nii.ac.jp:00008511,
 author = {Ohfuku, Yuko and 大福, 裕子},
 month = {},
 note = {Since life began on earth about 4 billion years ago,numerous species,numbering more than a million,are estimated to be living now on our planet.The diversity of the living life-forms is ..., 2002, Includes bibliographical references},
 school = {筑波大学, University of Tsukuba},
 title = {Protein evolution based on analysis of DNA sequences},
 year = {2003}
}