Precision photometry with difference imaging in the WTSJ. Zendejas, J. Koppenhoefer, R.P. Saglia, J.L. Birkby, S.T. Hodgkin, G. Kovács, D.J. Pinfield, B. Sipőcz and the RoPACS collaborationEPJ Web of Conferences, 47 (2013) 01005DOI: https://doi.org/10.1051/epjconf/20134701005