Norman and Mei 's hypothesis is widely quoted .
Norman and Mei 's hypothesis is widely has recently been criticized by Laurent Sagart who suggest that on the most eastern coast Austronesian languages were spoken and in inland areas Austroasiatic languages .
Norman and Mei 's hypothesis is widely quoted , but has recently been criticized by Laurent Sagart who suggest that on the most eastern coast Austronesian languages were spoken and in inland areas Austroasiatic languages .