Variation of bending strength of fiber reinforced concrete beams due to fiber distribution and orientation and analysis of microstructureHerrmann, Heiko; Boris, R.; Goidyk, Oksana; Braunbrück, AndresIOP conference series : materials science and engineering2019 / art. 012059, 11 p. : ill https://doi.org/10.1088/1757-899X/660/1/012059 Conference proceedings at Scopus Article at Scopus Article at WOS