Ktsoyan, A.S. Mkhitar Heratsi : XII century physician : (In commemoration of the 850th anniversary) / A.S. Ktsoyan ; translated by V.S. Derderian. - Yerevan : Hayastan, 1969. - 68 p. : ill., portr. ; 17 cm. Bibliography: p. 61-65. Subjects--Personal Names: Heratsi, Mkhitar, 1120-1200.