@article{:/content/journals/10.22233/20412495.0313.12, author = "Wray, Jon", title = "How to…", journal = "BSAVA Companion", year = "2013", volume = "2013", number = "3", eid = , pages = "12-17", url = "https://www.bsavalibrary.com/content/journals/10.22233/20412495.0313.12", doi = "https://doi.org/10.22233/20412495.0313.12" }