@inproceedings{Simon:2016Id, author = "Simon, Vojtech and Pizzichini, Graziella and Hudec, René", title = "{Long gamma-ray bursts in the Swift era: the color indices of their optical afterglows }", doi = "10.22323/1.246.0063", booktitle = "Proceedings of XI Multifrequency Behaviour of High Energy Cosmic Sources Workshop {\textemdash} PoS(MULTIF15)", year = 2016, volume = "246", pages = "063" }