@article{AhmedNR22,
  author       = {Shareef Ahmed and
                  Shin{-}Ichi Nakano and
                  Md. Saidur Rahman},
  title        = {r-Gatherings on a star and uncertain r-gatherings on a line},
  journal      = {Discret. Math. Algorithms Appl.},
  volume       = {14},
  number       = {5},
  pages        = {2150160:1--2150160:31},
  year         = {2022}
}