Hassanat, Ahmad B. A., V. B. Surya Prasath, Khalil I. Mseidein, Mouhammd Al-awadi, and Awni Mansoar Hammouri. 2017. “A HybridWavelet-Shearlet Approach to Robust Digital ImageWatermarking”. Informatica 41 (1). https://puffbird.ijs.si/index.php/informatica/article/view/1592.