Pathak, Ashish, and Dileep Kumar. “A Characterization of Orthonormal Multilevel Wavelet Families in Sobolev Space over Local Fields of Positive Characteristic”. Tamkang Journal of Mathematics 52, no. 3 (August 1, 2021): 349-361. Accessed January 22, 2022. https://journals.math.tku.edu.tw/index.php/TKJM/article/view/3327.