@article{10_4064_aa_29_2_113_146,
     author = {K. Matthews},
     title = {A generalisation of {Artin's} conjecture for primitive roots},
     journal = {Acta Arithmetica},
     pages = {113--146},
     publisher = {mathdoc},
     volume = {29},
     number = {2},
     year = {1976},
     doi = {10.4064/aa-29-2-113-146},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/aa-29-2-113-146/}
}