A. Rahimi, A. Najati, and Y. N. Dehghan, “Continuous frame in Hilbert spaces”, MFAT, vol. 12, no. 2, pp. 170–182, Jun. 2006, Accessed: Dec. 16, 2025. [Online]. Available: https://zen.imath.kiev.ua/index.php/mfat/article/view/311