Nugroho, Maris Setyo, et al. “The Effect of Mortar Mixture Variations on the Compressive Strength and Ultrasonic Pulse Velocity”. INERSIA Lnformasi Dan Ekspose Hasil Riset Teknik Sipil Dan Arsitektur, vol. 18, no. 2, Dec. 2022, pp. 225-34, doi:10.21831/inersia.v18i2.55256.