7.Kim, H. S., Nam, J. S., Hwang, H. K., Jeon, J. K., and Kim, G. Y., “A Stduy on the
Penetration Resistance and Spalling Properties of High Strength Concrete by Impact
of High Velocity Projectile”, Journal of the Korea Concrete Institute, Vol.25, No.1,
2013, pp.99-106 (in Korean).