Murphy, Niall, Naughton, Thomas J., Woods, Damien, Henley, Beverley, McDermott, Kieran, Duffy, Elaine, van der Burgt, Peter J.M. and Woods, Niamh (2007) Implementations of a model of physical sorting. International Journal of Unconventional Computing, 4 (1). pp. 3-12. ISSN 1548-7199