@article{peternell+2015,
    AUTHOR = {Peternell, Martin and Gotthart, Lukas and Sendra, Juana and
              Sendra, J. Rafael},
     TITLE = {Offsets, conchoids and pedal surfaces},
   JOURNAL = {J. Geom.},
  FJOURNAL = {Journal of Geometry},
    VOLUME = {106},
      YEAR = {2015},
    NUMBER = {2},
     PAGES = {321--339},
       DOI = {10.1007/s00022-014-0251-1},
}