Ban, Olimpia I., Laurenţiu Droj, Delia A. Tușe, and Elena Botezat. “Operationalization of Importance-Performance Analysis With Nine Categories and Tested for Green Practices and Financial Evaluation”. Technological and Economic Development of Economy 28, no. 6 (November 15, 2022): 1711–1738. Accessed May 19, 2024. https://jbem.vgtu.lt/index.php/TEDE/article/view/17653.