@book{oai:toyo-bunko.repo.nii.ac.jp:00007054,
 author = {MAYUZUMI, Akitsu and MAYUZUMI, Akitsu},
 month = {},
 publisher = {Toyo Bunko},
 title = {Chapter 1. The Appearance of Vassal States and “Suzerainty” in the Ottoman Empire: The Case of Wallachia and Moldavia},
 year = {2019}
}