Tavárez H, Álamo C, Nieves E, Flores C. Using contingent valuation to estimate consumers’ willingness to pay for differentiated coffees in Puerto Rico. JAUPR [Internet]. 2021 Jan. 1 [cited 2024 Nov. 22];105(1):1-21. Available from: https://revistas.upr.edu/index.php/jaupr/article/view/19632