(en) Nana Ama Agyeman, A descriptive grammar of Efutu (southern Ghana) with a focus on serial verb constructions : a language documentation study, SOAS, University of London, (DOI10.25501/SOAS.00023586, lire en ligne)
(en) Samuel Gyasi Obeng, Efutu Grammar, Muenchen, Lincom Europa, coll. « Languages of the World/Materials » (no 472), , 122 p. (ISBN9783895866739)