| Type | Article | 
| Authors(s) | Endrestøl, A. & S. Roth | 
| Year | 2020 | 
| Title | The firebug Pyrrhocoris apterus (Linnaeus, 1758) (Hemiptera, Heteroptera) new to the Norwegian fauna – with an explosive expansion in Northern Europe | 
| Volume | 67 | 
| Page(s) | 81-90 | 
| Published in/Publisher | Norwegian Journal of Entomology |