Seals and sealings from the North-West of the Indian Subcontinent and Afghanistan (4th century BC - 11th century AD) - Callieri, Pierfrancesco (Istituto Universitario Orientale ; Istituto Italiano per l'Africa e l'Oriente, 1997)
Naples, Istituto Universitarion Orientale, Ph.D., 1987. Engl. translation of a revised version of the dissertation