Oh, B. H., Choi, S. C. and Cha, S. W. (2005). “Identification of relaxation in early-age
                           concrete using differential-type viscoelastic constitutive law.” J. of KSCE, KSCE,
                           Vol. 25, No. 1A, pp. 1-9 (in Korean).Oh, B. H., Choi, S. C. and Cha, S. W. (2005).
                           “Identification of relaxation in early-age concrete using differential-type viscoelastic
                           constitutive law.” J. of KSCE, KSCE, Vol. 25, No. 1A, pp. 1-9 (in Korean).
