KRAPAVICKAITE, Danute. Model‐based estimator of total expenditure on environmental protection. Mathematical Modelling and Analysis, [S. l.], v. 12, n. 3, p. 369–377, 2007. DOI: 10.3846/1392-6292.2007.12.369-377. Disponível em: https://journals.vilniustech.lt/index.php/MMA/article/view/7135. Acesso em: 29 jun. 2025.