BibTex format
@article{Cropper:2018:10.1007/s10994-018-5712-6,
author = {Cropper, A and Muggleton, SH},
doi = {10.1007/s10994-018-5712-6},
journal = {Machine Learning},
pages = {1--21},
title = {Learning efficient logic programs},
url = {http://dx.doi.org/10.1007/s10994-018-5712-6},
year = {2018}
}