Tomovski, Živorad (1997) “CONVERGENCE AND INTEGRABILITY OF COSINE TRIGONOMETRIC SUMS WITH QUASI-CONVEX COEFFICIENTS”, Matematichki Bilten, 21(1), pp. 117–120. Available at: https://bilten.smm.org.mk/index.php/bilten/article/view/1558 (Accessed: 14 August 2026).