BibTex format
@inproceedings{Harrison:2013:10.1016/S0924-977X(13)70991-X,
author = {Harrison, L and Wilson, S and Munafo, MR},
doi = {10.1016/S0924-977X(13)70991-X},
pages = {S623--S624},
publisher = {ELSEVIER SCIENCE BV},
title = {Sleep disturbance and pain severity: the influence of affective and attentional state},
url = {http://dx.doi.org/10.1016/S0924-977X(13)70991-X},
year = {2013}
}