@article{Safari2021004,
  title   = {Interaction of a pair of in-line bubbles ascending in an Oldroyd-B liquid: A numerical study},
  author  = {Mohammad Vahabi; Hamidreza Hadavandmirzaei; Babak Kamkari; Hesameddin Safari},
  journal = {European Journal of Mechanics - B/Fluids, vol. 85, pp. 413-429},
  year    = {2021},
  doi     = {10.1016/j.euromechflu.2020.11.004}
}