@article{JTNB_2008__20_1_45_0,
     author = {Baginski, Paul and Chapman, Scott T. and Schaeffer, George J.},
     title = {On the {Delta} set of a singular arithmetical congruence monoid},
     journal = {Journal de th\'eorie des nombres de Bordeaux},
     pages = {45--59},
     publisher = {Universit\'e Bordeaux 1},
     volume = {20},
     number = {1},
     year = {2008},
     doi = {10.5802/jtnb.615},
     mrnumber = {2434157},
     language = {en},
     url = {http://archive.numdam.org/articles/10.5802/jtnb.615/}
}