Readers should cite both the Bio-protocol preprint and the original research article where this protocol was used:

Cahalan, M(2021). Imaging Cytosolic Calcium in T Lymphocytes: a protocol for use with genetically encoded or chemical Ca2+ indicators. Bio-protocol Preprint. bio-protocol.org/prep917.
Dong, T. X., Othy, S., Jairaman, A., Skupsky, J., Zavala, A., Parker, I., Dynes, J. L. and Cahalan, M. D.(2017). T-cell calcium dynamics visualized in a ratiometric tdTomato-GCaMP6f transgenic reporter mouse. eLIFE. DOI: 10.7554/eLife.32417