===== First Extragalactic Detection of NH3 ===== R. N. Martin and P. T. P. Ho,\\ **[[https://ui.adsabs.harvard.edu/abs/1979A%26A....74L...7M|Detection of Extragalactic Ammonia]]**,\\ //Astron. Astrophys.// **74**, L7-L9 (1979). Source(s): NGC253, IC342\\ Facility: MPIfR 100m\\ ---- Contributor(s): S. Thorwirth; 09/2005 ----