«Description of Positively Existentially Closed Models in Any Class of -Structures With Unary Predicates Axiomatizable by Any H-Universal Sentence». 2011. Вестник КазНУ. Серия математика, механика, информатика 69 (2): 39-43. https://bm.kaznu.kz/index.php/kaznu/article/view/193.