These are some links about linguistic issues like tone, transfer, and orthography. - http://www.degruyter.com/dg/viewarticle/j$002fling.1988.26.issue-1$002fling.1988.26.1.125$002fling.1988.26.1.125.xml - The Problem of Transfer in Nonlinear Morphology: https://books.google.com/books?id=5ZmRelGbriEC&pg=PA36&lpg=PA36&dq=The+Problem+of+Transfer+in+Nonlinear+Morphology&source=bl&ots=d1i9nPBmbE&sig=2ZMjD9FIdN1BSaX1WD2it1Aub7M&hl=en&sa=X&ei=yQ2eVIONF5TjoATAo4GQBA&ved=0CDgQ6AEwBQ#v=onepage&q=The%20Problem%20of%20Transfer%20in%20Nonlinear%20Morphology&f=false - Things which site the above: https://scholar.google.com/scholar?cites=12060005355925121709&as_sdt=5,38&sciodt=1,38&hl=en
These are some links about linguistic issues like tone, transfer, and orthography.