@article{fornell1981,
  title={Structural Equation Models with Unobservable Variables and Measurement Error: Algebra and Statistics},
  author={Claes Fornell and David F. Larcker},
  year={1981},
  journal={Journal of Marketing Research},
  doi={10.2307/3150980},
  url={https://doi.org/10.2307/3150980}
}