Greetings Indologists,

I am posting for a colleague who is working with a "very bright undergraduate student" on a research paper that falls slightly outside her (and my) areas of expertise. 

Her student is looking for thoughts/sources that discuss the evolution of -akṣ- to -ekh- in certain South Asian vernaculars. Some examples that immediately come to my mind are "Gorekha" (from gorakṣa) and "Alekha" (from alakṣya) in Odia. 

They are also looking for sources discussing how such phonetic changes can impact orthography (like how some phonetic changes come to be reflected in writing, while others are not?) and/or meaning (like how Odia "alekha" takes on the semantic range of both a+√lakṣ and a+√likh?). 

Thank you all.