Simatupang, R., and D. Supriatna. “Designing a Tapperless Blade With an S-4320 Airfoil on a Micro-Scale Horizontal Axis Wind Turbine (Case Studies at PT Lentera Bumi Nusantara)”. MOTIVECTION : Journal of Mechanical, Electrical and Industrial Engineering, Vol. 3, no. 1, Jan. 2021, pp. 27-34, doi:10.46574/motivection.v3i1.81.