Prolonged consonant
Хүмүүнлэгийн ухаан
Хэл шинжлэл
Онолын хэл шинжлэл
https://books.google.mn/books?id=Jgrbu6hiJEcC&pg=PA68&lpg=PA68&dq=%D0%B4%D0%BB%D0%B8%D1%82%D0%B5%D0%BB%D1%8C%D0%BD%D1%8B%D0%B9+%D1%81%D0%BE%D0%B3%D0%BB%D0%B0%D1%81%D0%BD%D1%8B%D0%B9&source=bl&ots=i70Ms9Spdz&sig=ACfU3U2HPr7DgGqrSXBL2pYELZd7Uj3RXA&hl=en&sa=X&ved=2ahUKEwiuwtrTvdDnAhUoG6YKHZdZDh8Q6AEwBnoECAoQAQ#v=onepage&q=%D0%B4%D0%BB%D0%B8%D1%82%D0%B5%D0%BB%D1%8C%D0%BD%D1%8B%D0%B9%20%D1%81%D0%BE%D0%B3%D0%BB%D0%B0%D1%81%D0%BD%D1%8B%D0%B9&f=false