@article{atm-apps,
    type = "article",
    author = "Michael Croucher and Peter Rowlett and Hazel Lewis",
    year = "2012",
    title = {Smartphone apps for mathematics},
    journal = "Mathematics Teaching",
    volume = "227",
    pages = "36-37",
    url = "http://www.atm.org.uk/journal/archive/mt227files/ATM-MT227-36-37.pdf"
}