« COWPEA [ VIGNA UNGUICULATA (L.) WALP.] CROPPING SYSTEMS MAPPING AND FARMERS’ PERCEPTION ON SOIL FERTILITY IN BENIN: N. F. ANAGO.*, G. D. DAGBENONBAKIN **, E. C. AGBANGBA**, T. C. B. OUSSOU **, F. CHABI *, A. SAIDOU * & G. L. AMADJI * », ASA, vol. 20, nᵒ 1, p. 65–77, janv. 2020, doi: 10.2023/sf2p7n55.