8.Yang, I. H., Joh, C. B., Kang, S. T., and Kim, B. S., “An Experimental Study on
                           Flexural Behavior of Steel Fiber Reinforced Ultra High Performance Concrete,” Journal
                           of Korean Concrete Institute Structural, Vol. 21, No. 6, 2009, pp. 737-744. (doi:
                           http://dx.doi.org/ 10.4334/JKCI.2009.21.6.737)
