Tapan Parikh, an Assistant Professor at the School of Information, UC Berkely talks about creating user interfaces for micofinancing in rural India and outlines a set of user interface guidelines based on his studies.
Though still not the exactly the kind of guidelines I’m looking for, atleast it’s a lead. And it talks about the importance of the device and input processes as well.
I had also found this paper a couple of days ago. Tapan Parikh is one of the co-authors too