@article{effortjustificationforfunactivitiesthe,
  title = {Effort justification for fun activities?: The effect of location-based mobile coupons using games},
  author = {Kim and H. J. and & Song and H.},
  year = {2019},
  url = {https://www.sciencedirect.com/science/article/abs/pii/S0969698919308811},
}