In astronomy, blitzars are a hypothetical type of neutron star, specifically pulsars that can rapidly collapse into black holes if their spinning slows down. Heino Falcke and Luciano Rezzolla[1] proposed these stars in 2013 as an explanation for fast radio bursts.[2]
RU-2013-07-04-PR-894031 was invoked but never defined (see the help page).