preliminary reading on Vid�shaka
S. Visuvalingam, Abhinavaguptas Conception of Humor: Its Resonances in Sanskrit Drama, Poetry, Hindu Mythology and Spiritual Practice. For a general idea of the problem of the Vid�shaka, see the following works: J. T. Parikh, The Vid�shaka: Theory and Practice (Surat: Sarvajanik Education Society, 1953); G.K. Bhat, The Vid�shaka (Ahmedabad: The New Order Book Co., 1959); Kuiper, Varuna and Vid�shaka.