@article{10_2298_PIM140617001T,
     author = {Tim Trudgian},
     title = {The {Sum} of the {Unitary} {Divisor} {Function}},
     journal = {Publications de l'Institut Math\'ematique},
     pages = {175 },
     publisher = {mathdoc},
     volume = {_N_S_97},
     number = {111},
     year = {2015},
     doi = {10.2298/PIM140617001T},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.2298/PIM140617001T/}
}