PROBLEMS OF GENERAL AND TYPOLOGICAL THEORY OF COMPOSITE SENTENCE WITH A PARENTHETICAL CLAUSE AS AN INVARIANT TYPE OF SYNTACTIC UNIT (to the statement of question of parenthetical introductory and insertive clauses). (2024). Scientific Journal of the Fergana State University, 30(1), 74. https://journal.fdu.uz/index.php/sjfsu/article/view/3559