R.Ratha Jeyalakshmi. “Congruence of Gluing of Lattices and Gluing of Congruence Lattices”. International Journal of Advanced Science and Technology 29, no. 7s (April 20, 2020): 1222 - 1228. Accessed September 18, 2021. https://sersc.org/journals/index.php/IJAST/article/view/10693.