1. Language, speech and cerebral dominance;Annett;CPC,1998
2. Annett, M., 2000. No homo speciated on cerebral dominance. Psycholoquy:11, #20 Language Sex Chromosomes (2).
3. Mainly on the air;Beerbohm,1946
4. Language and species;Bickerton,1990
5. Unravelling the evolution of language;Botha,2003