If you make use of ORCAN, please cite the following article:
Zielezinski A, Dziubek M, Sliski J, Karlowski WM.
ORCAN-a web-based meta-server for real-time detection and functional annotation of orthologs.
Bioinformatics. (2017) 33(8):1224-1226. doi: 10.1093/bioinformatics/btw825.