BibTex format
@article{Isham:1997:10.1007/BF02435786,
author = {Isham, CJ},
doi = {10.1007/BF02435786},
journal = {INTERNATIONAL JOURNAL OF THEORETICAL PHYSICS},
pages = {785--814},
title = {Topos theory and consistent histories: The internal logic of the set of all consistent sets},
url = {http://dx.doi.org/10.1007/BF02435786},
volume = {36},
year = {1997}
}