Which giant ellipticals can host radio jets?: The UGC FR I radio galaxy sample . Verdoes Kleijn G.A., Baum S.A., van der Marel R.P., O'Dea C.P., Noel-Storr J., van Gorkom J., de Zeeuw P.T. in `Active Galactic Nuclei: from Central Engine to Host Galaxy', Collin S., Combes F., Shlosman I., eds., ASP Conference Series, Vol. 290, 259-260, 2003 . 2003. ... The results warrant further testing of the scenario that many ellipticals go through a radio-jet phase. ...