To cite testassay in publications use:

Fay M, Sachs M, Miura K (2018). “Measuring precision in bioassays: Rethinking assay validation.” Statistics in Medicine, 37(4), 519–529. https://pmc.ncbi.nlm.nih.gov/articles/PMC5771887/.

Corresponding BibTeX entry:

  @Article{,
    title = {Measuring precision in bioassays: Rethinking assay
      validation},
    author = {M. P. Fay and M. C. Sachs and K. Miura},
    journal = {Statistics in Medicine},
    year = {2018},
    volume = {37},
    number = {4},
    pages = {519--529},
    url = {https://pmc.ncbi.nlm.nih.gov/articles/PMC5771887/},
  }