@article{JEMS_2015_17_3_a3,
     author = {Joan Bagaria and Carles Casacuberta and A.R.D. Mathias and Ji\v{r}{\'\i} Rosick\'y},
     title = {Definable orthogonality classes in accessible categories are small},
     journal = {Journal of the European Mathematical Society},
     pages = {549--589},
     publisher = {mathdoc},
     volume = {17},
     number = {3},
     year = {2015},
     doi = {10.4171/jems/511},
     url = {http://geodesic.mathdoc.fr/articles/10.4171/jems/511/}
}