@ARTICLE{Ruder:2008:Rel,
    author = {H. Ruder and D. Weiskopf and H.-P. Nollert and T. M{\"u}ller},
    title  = {How computers can help us in creating an intuitive access to relativity},
    journal = {New J. Phys.},
    year = {2008},
    volume = {10},
    pages = {125014}
}