Παπακωνσταντίνου Α, Φουσέκης Π. Substitution and expansion effects in Greek agriculture: analysis with a non-parametric approach. SPOUDAI [Internet]. 2001 Dec. 15 [cited 2024 Sep. 20];51(3-4):76-89. Available from: http://spoudai.org/index.php/journal/article/view/491