BibTex format
@article{Sripa:2018,
author = {Sripa, P and Hayhoe, BWJ and Garg, P and Majeed, FA and Greenfield, G},
journal = {British Journal of General Practice},
title = {Impact of general practitioner gatekeeping on quality, health outcomes, utilisation and expenditure: a systematic review},
year = {2018}
}