by Sridharan, R., Chandra, H., Das, S.R., Sekar, R., Sinha, H.S.S., Raju, D.Pallam, Narayanan, R., Raizada, Shika, Misra, R.N., Raghavarao, R., Vyas, G.D., Rao, P.B., Ramarao, P.V.S., Somayajulu, V.V., Babu, V.V., Danilov, A.D.
Published in Journal of atmospheric and solar-terrestrial physics (01.11.1997)

by Raju, D.Pallam, Sridharan, R., Narayanan, R., Modi, N.K., Raghavarao, R., Subbaraya, B.H.
Published in Journal of atmospheric and terrestrial physics (1995)