Inoue, Masumi, Heesup Choi, Yuhji Sudoh, and Koichi Ayuta. 2017. “Experimental Study of Leaching and Penetration of Nitrite Ions in Nitrite-Type Repair Materials on the Surface of Concrete”. Advances in Technology Innovation 2 (1):22-24. https://ojs.imeti.org/index.php/AITI/article/view/206.