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Baafi, Ernest; Carey, Edward E.; Blay, Essie T.; Ofori, Kwadwo; Gracen, Vernon E.; Manu-Aduening, Joe (2016년 6월 20일). “Genetic incompatibilities in sweetpotato and implications for breeding end-user preferred traits”. 《Australian Journal of Crop Science》 10 (6): 887–894. doi:10.21475/ajcs.2016.10.06.p7618. ISSN1835-2693.
Njiraini, John (2016년 4월 30일). “Is Africa the new face of rising wealth and opulence?”. 《Africa Renewal》 29 (1): 28–29. doi:10.18356/87f27ce9-en. ISSN2517-9829.
Ptak, Roderich (1992). “The Northern Trade Route to the Spice Islands : South China Sea – Sulu Zone – North Moluccas (14th to early 16th century)”. 《Archipel》 43 (1): 27–56. doi:10.3406/arch.1992.2804. ISSN0044-8613.
Schneider, Caroline (March 2015). “New deep-furrow drills could help more Pacific Northwest farmers move to conservation tillage”. 《Crops & Soils》 48 (2): 18–19. doi:10.2134/cs2015-48-2-3. ISSN0162-5098.