MTI/A0: modular arithmetic or elliptic curves? In the Handbook of Applied Cryptography (Menezes, A. J.; van Oorschot, P. C. &amp; Vanstone, S. A.) Protocol MTI/A0 key agreement (algorithm 12.53) described as $\mod p$-protocol. The survey Overview of Key Agreement Protocols
(Ratna Dutta and Rana Barua) describes MTI/A0 as elliptic curve-protocol. 

Unfortunately I have no access to original MTI article. How MTI-protocols were described originally?
It is quite simple to convert MTI/A0 into an elliptic curve method. An implementation is here.