The ancient triumvirate poets (Pracheena kavithrayam) of Malayalam poetry are Ezhuthachan, Cherusseri Namboothiri and Kunchan Nambiar.The ancient triumvirate poets was chosen in the basis of Bhakthi Maargam (Religious Way). The modern triumvirate poets (Adhunika kavithrayam) of Malayalam poetry are N. Kumaran Asan, Vallathol Narayana Menon and Ulloor S. Parameswara Iyer.The mordern triumvirate poets was chosen in the basis of Social Activism. Written and Edited by Arya Sivadas, Dubai, UAE 
- ^ O. N. V. Kurup (2005). A. J. Thomas, ed. This Ancient Lyre: Selected Poems. Sahitya Akademi. p. 10. ISBN 8126017910.