Luisa Gargano Mikael Hammar Pavol Hell Ladislav Stacho Ugo Vaccaro Spanning spiders and light-splitting switches. 83-95 2004 285 Discrete Mathematics 1-3 http://dx.doi.org/10.1016/j.disc.2004.04.005 db/journals/dm/dm285.html#GarganoHHSV04