APA   Click to copy
Heikkila, J., & Verba, M. (2018). The role of utility models in patent filing strategies: evidence from European countries. Scientometrics, 116, 689–719.

Chicago/Turabian   Click to copy
Heikkila, Jussi, and Michael Verba. “The Role of Utility Models in Patent Filing Strategies: Evidence from European Countries.” Scientometrics 116 (2018): 689–719.

MLA   Click to copy
Heikkila, Jussi, and Michael Verba. “The Role of Utility Models in Patent Filing Strategies: Evidence from European Countries.” Scientometrics, vol. 116, Springer, 2018, pp. 689–719.

@article{heikkila2018a,
  title = {The role of utility models in patent filing strategies: evidence from European countries},
  year = {2018},
  journal = {Scientometrics},
  pages = {689--719},
  publisher = {Springer},
  volume = {116},
  author = {Heikkila, Jussi and Verba, Michael}
}