@article{OrdyniakSzeider13,
 author = {Sebastian Ordyniak and Stefan Szeider},
 doi = {10.1613/jair.3744},
 journal = {Journal of Artificial Intelligence Research},
 pages = {263-302},
 title = {Parameterized Complexity Results for Exact {B}ayesian
Network Structure Learning},
 volume = {46},
 year = {2013}
}