Are line breaks and lists supposed to work in comments? If not, how was I supposed to write the following answer to my own question?
"I have found two references. Indulal, G. (2007). Studies on the spectrum and the energy of graphs. (Doctoral dissertation, Cochin University of Science and Technology). Definition 30, page 16. Emanuele Munarini, Claudio Perelli Cippo, Andrea Scagliola, Norma Zagaglia Salvi, Double graphs, Discrete Mathematics, Volume 308, Issues 2–3, 6 February 2008, Pages 242-254"
I wanted a list containing the two references, and I tried doing what the documentation says, but this does not work?