@article{oai:tsukuba.repo.nii.ac.jp:00000422,
 author = {Aoba, Nobuko and 青葉, 暢子},
 journal = {筑波大学経済学論集, The University of Tsukuba economic review},
 month = {Oct},
 pages = {167--183},
 title = {Portfolio Selection and Insurance Period},
 volume = {47},
 year = {2001}
}