WASET
    Sandro MourĂ£o and  Karla Okada,  Mobile Phone as a Tool for Data Collection in Field Research.   journal   = {International Journal of Computer and Information Engineering}, [online]. World Academy of Science, Engineering and Technology.
    October 2010, vol. 46(10). 1491 - 1495
    [viewed 28 March 2024]. Available from: https://publications.waset.org/pdf/4901.