Delisle, H., Bakari, S., Gevry, G., Picard, C. and Ferland, G. (1997) “Provitamin A content of traditional green leaves from Niger”, Cahiers Agricultures, 6(6), pp. 553–559. Available at: https://revues.cirad.fr/index.php/cahiers-agricultures/article/view/30053 (Accessed: 17 May 2024).