Question: Where can I find, and how should I cite, the Supernova publication?
Answer: Here is the citation for the Supernova publication:
Weisenfeld NI, Kumar V, Shah P, Church DM, Jaffe DB (2017). Direct determination of diploid genome sequences. Genome Research 27: 757-767 (doi:10.1101/gr.214874.116)
You can find it here: https://genome.cshlp.org/content/27/5/757.long