La dièresi

http://enxaneta.info/activitats/dieresi/6

https://rebollengua.jimdo.com/bagul-d-ortografia/5-la-di%C3%A8resi/

http://llenguacat.wikispaces.com/file/view/Dieresi%20teoria.pdf/280700242/Dieresi%20teoria.pdf

http://llenguacat.wikispaces.com/file/view/%C3%9AS%20I%20ESTALVI%20DE%20LA%20DI%C3%88RESI.pdf/228391922/%C3%9AS%20I%20ESTALVI%20DE%20LA%20DI%C3%88RESI.pdf