Grammatical Facial Expressions Recognition with Machine Learning. - Fernando de Almeida Freitas; Sarajane Marques Peres; Clodoaldo Aparecido de Moraes Lima; Felipe Venâncio Barbosa (FLAIRS, 2014)

Grammatical Facial Expressions. - Fernando de Almeida Freitas; Felipe Venâncio Barbosa; Sarajane Marques Peres (UCI Machine Learning Repository, 2014)

Grammatical facial expression recognition in sign language discourse: a study at the syntax level. - Fernando de Almeida Freitas; Sarajane Marques Peres; Clodoaldo Ap. M. Lima; Felipe Venâncio Barbosa (Inf. Syst. Frontiers, 2017)