DRAGOMIR SS. An extension of Wirtinger’s inequality to the complex integral. Stud. Univ. Babeş-Bolyai Math. [Internet]. 2023 Sep. 30 [cited 2025 Sep. 1];68(3):507-16. Available from: https://studia.reviste.ubbcluj.ro/index.php/subbmathematica/article/view/6443