Value chain analysis of medicinal plants in Geoparks: Livelihoods of ethnic minorities based on non-timber forest products (NTFPs) in Vietnam - An Thinh Nguyen; Kien Huy Ngo; Nam Xuan Ngo; Ngoc Anh Le; Ngoc Trinh Phuong; Do Thi Thao; Huyen Trang Le; Chi Linh Vu; Thi Toan Luu; Van Quy Khuc; Hao Thi Nguyen; Duc Bao Nguyen (PLoS ONE, 2025)