Sutanto, O. P., Widiyastuti, Y., Pujiasmanto, B., & Yunus, A. (2024). Analysis of Growth and Yield of Echinacea Purpurea with the Addition of Biochar and Plant Growth Regulator. International Journal on Advanced Science, Engineering and Information Technology, 14(3), 962–966. https://doi.org/10.18517/ijaseit.14.3.18006