1.
Allen D. Conceptual Level and Program Openness: Some Data on Matching Models. CJE/RCÉ [Internet]. 1977 Jan. 1 [cited 2026 Sep. 19];2(4):55-64. Available from: https://cje.journals.publicknowledgeproject.org/cje/index.php/cje-rce/article/view/7944