Michael R. Fellows Fedor V. Fomin Daniel Lokshtanov Elena Losievskaja Frances A. Rosamond Saket Saurabh Distortion Is Fixed Parameter Tractable. 463-474 2009 ICALP (1) http://dx.doi.org/10.1007/978-3-642-02927-1_39 conf/icalp/2009-1 db/conf/icalp/icalp2009-1.html#FellowsFLLRS09