http://www.academia.edu/236279/Periphrastic_perfects_in_the_Coptic_dialects_a_case_study_in_grammaticalization (Eitan Grossmann) http://www.academia.edu/4256198/A_rare_case_of_Differential_Marking_on_A_S_The_case_of_Coptic (Eitan Grossman)
