Khanjanzadeh, Zeinab, and Ali Madanshekaf. 2018. “LAWVERE-TIERNEY SHEAVES, FACTORIZATION SYSTEMS, SECTIONS AND J-ESSENTIAL MONOMORPHISMS IN A TOPOS”. Italian Journal of Pure and Applied Mathematics 39 (February):55-72. https://journals.uniurb.it/index.php/ijpam/article/view/6954.