Sandeepan, K., M. Jha, S. Purari, P. K. Sharma, S. ., and C. Kumar. “Hypertrophic Pachymeningitis: A Rare Manifestation of IgG4 Related Disease”. International Journal of Research in Medical Sciences, vol. 11, no. 7, June 2023, pp. 2732-5, doi:10.18203/2320-6012.ijrms20232134.