Ivanova, N., Stoyanova, Z. and Mishev, P. (2012) “Estimation of Optimal Tax Level on Pesticides Use and its Impact on Agriculture”, Bulgarian Journal of Agricultural Science, 18(5), pp. 641–650. Available at: https://agriacad.eu/ojs/index.php/bjas/article/view/5800 (Accessed: 18 October 2026).