wicaksono, suantoro. “THE EFFECT OF CONCRETE AGE ON INTEGRITY TESTING OF FOUNDATIONS OF BORED PILE”. Jurnal Jalan Jembatan 39, no. 1 (June 30, 2022): 15–20. Accessed January 20, 2026. https://binamarga.pu.go.id/jurnal/index.php/jurnaljalanjembatan/article/view/1068.