"??u t? tr?c ti?p n??c ngoài vào l?nh v?c xây d?ng và b?t ??ng s?n - th?c tr?ng và nh?ng v?n ?? ??t ra - T?p chí C?ng s?n". tapchicongsan.org.vn. Retrieved 2024-02-01. ^ a b Then, there is a green roof root barrier and waterproof barrier set into position, followed by the drainage, a filter, the soil or increasing medium, then the vegetation