Brockington, J.L., The sacred thread, Edinburgh, 1981.
2.
Dumont, Louis, Homo heirarchicus, London, 1971 .
3.
Eruttaccan, K.N., 'Kilippāttu' (Parrot Song in George, K. M., (ed.), Sāhitya caritram prasthanannalilūte (literary history through movements, Kottayam, 1989, pp. 355-434.
4.
Hopkins, T.J., The Hindu religious tradition, Belmong, 1971.
5.
Menon, A.Sreedhara, Kerala caritra silpikal (architects of Kerala history, Kottayam, 1988.
6.
Nair, K. Vijayan, Mahābhāratam-śānti parvam (introduction, text and commentary, Kottayam, 1978.
7.
Nair, T. P. Balakrishnan, 'Eruttaccante adhyātma rāmāyanavum adhyātma rāmāyanam mūlavum' (Eruttaccan's Adhyātma Rāmāyana and the Adhyātma Rāmāyana original, in Guptan Nair, S. (ed.), Tunccan prabhandhannal (Tuncan essays, Trichur, 1985, pp. 1-48.
8.
Naykat, Gangadharan, 'Eruttaccante bhāratam' (Eruttaccan's Bhāratam, in Guptan Nair, S., Tunccan prabandhannal (Tunccan essays), Trichur1985, pp. 49-93.
9.
Pilla, ErumeliParameswaran, Mahābhāratam-drōna parvam (introduction, text and commentary, Kottayam, 1975.
