@misc{deras134,
    author = "Burcin, Boris and Hul\'{i}kov\'{a} Tes\'{a}rkov\'{a}, Kl\'{a}ra and Kom\'{a}nek, David",
    title = "DeRaS 1.3.4",
    howpublished = "\url{http://deras.natur.cuni.cz}",
    year = "2012"
}