Research on the Evaluation of Technological Innovation Efficiency of High - tech Indus-tries in Sichuan Province Based on DEA - BCC Model. 经济学年鉴, [S. l.], v. 1, n. 1, p. 76–80, 2025. DOI: 10.63313/Economics.8004. Disponível em: https://cn.erytis.com/index.php/Economics/article/view/74. Acesso em: 14 aug. 2025.