@incollection{mathsengage-turing,
    type = "incollection",
    author = "Charles Walkden and Andrew Hazel and Greg Chamberlain and Katie Steckles and Peter Rowlett",
    editor = "Katie Steckles and Peter Rowlett",
    year = "2023",
    title = {Alan Turing Cryptography Competition},
    booktitle = "Mathematics Engagement Case Studies",
    pages = "1-3",
    publisher = "Sheffield Hallam University",
    address = "Sheffield, U.K.",
    url = "https://katiesteckles.co.uk/casestudies/case\_studies\_book.pdf"
}