@ARTICLE{
author={Cakic Nenad P,Mansour Toufik,Smith Rebecca},
year={2019},
title={Counting Visible Levels in Bargraphs and Set Partitions},
journal={FILOMAT},
volume={33},
number={19},
pages={6229-6237},
document_type={Article},
} 

@ARTICLE{
author={Cakic Nenad P,Mansour Toufik,Smith Rebecca},
year={2018},
title={Elements protected by records in set partitions},
journal={JOURNAL OF DIFFERENCE EQUATIONS AND APPLICATIONS},
volume={24},
number={12},
pages={1880-1893},
document_type={Article},
}