@book{oai:nichibun.repo.nii.ac.jp:00005272,
 author = {RUSSELL,  Kerri},
 month = {Dec},
 publisher = {国際日本文化研究センター, International Research Center for Japanese Studies},
 title = {Contraction and Monophthongization in Old Japanese},
 volume = {31},
 year = {2003}
}