Денисюк ВП, Рибачук ЛВ, Негоденко ОВ. Construction of approximate solutions of boundary value problems for ordinary differ-ential equations in the form of trigonometric polynomials. PIC [Internet]. 2014 Mar. 29 [cited 2026 Apr. 22];1(45):37-41. Available from: http://jrnl.kai.edu.ua/index.php/PIU/article/view/7694