APA   Click to copy
Stadler, M., Niepel, C., & Greiff, S. (2019). Differentiating between static and complex problems: A theoretical framework and its empirical validation. Intelligence, 72, 1–12. https://doi.org/10.1016/j.intell.2018.11.003

Chicago/Turabian   Click to copy
Stadler, M., C. Niepel, and S. Greiff. “Differentiating between Static and Complex Problems: A Theoretical Framework and Its Empirical Validation.” Intelligence 72 (2019): 1–12.

MLA   Click to copy
Stadler, M., et al. “Differentiating between Static and Complex Problems: A Theoretical Framework and Its Empirical Validation.” Intelligence, vol. 72, 2019, pp. 1–12, doi:10.1016/j.intell.2018.11.003.

@article{stadler2019a,
  title = {Differentiating between static and complex problems: A theoretical framework and its empirical validation},
  year = {2019},
  journal = {Intelligence},
  pages = {1-12},
  volume = {72},
  doi = {10.1016/j.intell.2018.11.003},
  author = {Stadler, M. and Niepel, C. and Greiff, S.}
}