Onuwa, Godfrey C. „Market Performance: Market Margin, Efficiency, and Income Inequality Among Bell Pepper (Capsicum Annuum) Traders in Jos-North, Plateau State, Nigeria”. Zeszyty Naukowe SGGW W Warszawie - Problemy Rolnictwa Światowego, t. 26, nr 2, lipiec 2026, s. 61-75, doi:10.22630/PRS.2026.26.2.8.