Sewell Robert. Forgotten Empire: Vijayanagar. A Contribution to the History of India

Kessinger Publishing, 2004. — 542 p.The first rulers of Vijayanagar, however, did not dare to call themselves kings, nor did even the Brahmans do so who composed the text of their early inscriptions. It is for this reason that I have spoken of Harihara I and Bukka I as "Chiefs." The inscription referred to of Harihara in 1340 calls him "Hariyappa VODEYA," the former name being less honourable than "Harihara," and the latter definitely entitling him to rank only as a chieftain.