Hiroshi Kubo, Shinya Inazumi, and Toshihiko Miura. “HYDROCHLORIC ACID HEAT REACTION METHOD TO MEASURE CEMENT CONTENTS IN CEMENT MIXED SOILS”. GEOMATE Journal, vol. 15, no. 52, Oct. 2018, pp. 177-83, https://geomatejournal.com/geomate/article/view/789.