@article{ZR_2015_17_25_a0,
     author = {Antonio Avil\'es},
     title = {An {Introduction} to {Multiple} {Gaps}},
     journal = {Zbornik radova},
     pages = {7 },
     publisher = {mathdoc},
     volume = {17},
     number = {25},
     year = {2015},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ZR_2015_17_25_a0/}
}