Yamada (2010), p. 70 Yamada, Yoshiko (2010). "A Preliminary Study of Language Contacts around Uilta in Sakhalin". Běifāng rénwén yánjiū / Journal of the Center for Northern Humanities. 3: 59–75. hdl:2115/42939.
Yamada (2010), p. 60 Yamada, Yoshiko (2010). "A Preliminary Study of Language Contacts around Uilta in Sakhalin". Běifāng rénwén yánjiū / Journal of the Center for Northern Humanities. 3: 59–75. hdl:2115/42939.