Combined and Uneven Comparisons. Rethinking the Fields of African and Postcolonial Literary Studies Within the Debate on World-Literature. Notes for New Comparatist Avenues - - - Comparativismos Combinados e Desiguais. Repensar O Campo dos Estudos Literários Africanos e Pós-Colonais À Luz do Debate Sobre Literatura-Mundial. Notas Para Novos Caminhos Comparatistas