by Hyvönen, N., Nandakumaran, A. K., Varma, H. M., Vasu, R. M.
Published in Mathematical methods in the applied sciences (30.07.2013)

by Varma, H. M., Singh, Jagmer, Krishnamurthy, P., Duraiswami, R. A.
Published in Journal of the Geological Society of India (01.03.2022)

by Varma, H. M., Banerjee, B., Nandakumaran, A. K., Vasu, R. M., Roy, D.
Published in Current science (Bangalore) (25.10.2009)

by Dougali, N. K., Kumar, Sunil, Raju, R. Dhana, Varma, H. M., Dougall, N. K.
Published in Current science (Bangalore) (05.11.1983)

by Singh, Jagmer, Saxena, D. N., Varma, H. M., Raju, R. Dhana
Published in Current science (Bangalore) (01.01.1983)