Lax pair, Darboux transformation, vector rational and semi-rational rogue waves for the three-component coupled Hirota equations in an optical fiberZhong Du, Bo Tian, Han-Peng Chai and Xue-Hui ZhaoEur. Phys. J. Plus, 134 5 (2019) 213DOI: https://doi.org/10.1140/epjp/i2019-12515-4