Angelina, Emmanuel; Onyeche, Ejembi D; Paulina, Dominic O. E.(Department of Home Economics & Hospitality Management Education, University of Nigeria, P.M.B. 41001, Nsukka, Nigeria., 2022)
Sumelius, John; Grgic, Zoran; Mesic, Milan; Franic, Ramona(Sustainable Agriculture in Central and Eastern European Countries (CEESA), Berlin, Germany, 2002)
Germain, Marc; Toint, Philippe; Tulkens, Henry(Edward ElgarCenter for Operations Research and Econometrics (CORE), Catholic University of Louvain, Louvain-La-Neuve, Belgium, 1998)