Loan, L.T.T. and Phuong Nhung, B. 2025. Willingness to Pay for Smartphone-Based Plant Care Advisory Services: Evidence from Dang Xa Urban Area, Hanoi, Vietnam. Journal of Ecosystem Science and Eco-Governance . 7, 2 (Dec. 2025). DOI:https://doi.org/10.54610/jeseg.v7i2.200.