Ю. М-А. Хэн, ямар сэдвээр, хаана, хэзээ. : Who, what theme, where and when. Mong.Sud [Internet]. 2023 May 3 [cited 2024 Oct. 10];40(463):254-7. Available from: https://journal.num.edu.mn/ms/article/view/4375