Rozhankovskaya MI, Syavavko MS. Transformation of formal expansions of solutions of linear differential equations in a parameter into continued <em class="a-plus-plus">RITZ</em>-fractions. Ukr. Mat. Zhurn. [Internet]. 1998May25 [cited 2024Nov.24];50(5):679–686. Available from: https://umj.imath.kiev.ua/index.php/umj/article/view/4906