@article{10_2298_FIL1919229C,
     author = {Nenad Caki\'c and Toufik Mansour and Rebecca Smith},
     title = {Counting visible levels in bargraphs and set partitions},
     journal = {Filomat},
     pages = {6229 },
     year = {2019},
     volume = {33},
     number = {19},
     doi = {10.2298/FIL1919229C},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.2298/FIL1919229C/}
}