@article{10_1017_S0017089500032651,
     author = {Weger, Benjamin M. M. de},
     title = {On the fourth-powerfree part of x2 + 2},
     journal = {Glasgow mathematical journal},
     pages = {299--310},
     year = {1998},
     volume = {40},
     number = {3},
     doi = {10.1017/S0017089500032651},
     url = {http://geodesic.mathdoc.fr/articles/10.1017/S0017089500032651/}
}