↑Dr. Malayan, Ancient journey (2012) North Africa to North Malabar, Google Books, page 69
↑"500 Varshatte Keralam" - Collection of articles on the culture study of the Kerala, India (in Malayalam). Tharathamyapathanasangham. 1999. ISBN9788187378020.
↑Moorkoth Kunhappa.(1979), "Moorkoth Kumaran" (Malayalam), sahithyapravarthaka sahakaranasangham publishing. Original from: University of California