Shang J, Xie Y, Guo L, Fan J, Liu H. Evaluation of the nonmarket value of livestock and poultry feces returning to farmland utilization using CVM in Heilongjiang, China. Int J Agric & Biol Eng [Internet]. 2023 May 12 [cited 2025 Dec. 26];16(2):48-56. Available from: https://ijabe.migration.pkpps03.publicknowledgeproject.org/index.php/ijabe/article/view/7588