@article{10_4064_aa153_2_3,
     author = {Song Heng Chan},
     title = {Congruences for {Ramanujan's} $\phi $ function},
     journal = {Acta Arithmetica},
     pages = {161--189},
     publisher = {mathdoc},
     volume = {153},
     number = {2},
     year = {2012},
     doi = {10.4064/aa153-2-3},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/aa153-2-3/}
}