@article{Oakley2006,
author = {Oakley, A. and Strange, V. and Bonell, C. and Allen, E. and Stephenson, J.},
title= {Process evaluation in randomised controlled trials of complex interventions},
year = {2006},
doi = {10.1136/bmj.332.7538.413},
journal = {British Medical Journal},
volume = {332},
number = {7538},
pages = {413--416},
}