Rafiq, Silva, and Yates Johnson. “INVESTIGATING THE USE OF PFA POZZOLAN IN NON-HYDRAULIC LIME MORTAR FOR IMPROVED COMPRESSIVE AND FLEXURAL STRENGTH IN SUSTAINABLE MASONRY CONSTRUCTION”. International Journal of Allied Sciences (IJAS), vol. 13, no. 6, June 2022, pp. 11-19, https://zapjournals.com/Journals/index.php/Allied-Sciences/article/view/739.