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

Blanquie, O, Luhmann, H, Yang, J, Kilb, W, Sharopov, S and Sinning, A(2020). Immunofluorescence staining – quantification of activated-caspase 3-positive cells in brain slices:. Bio-protocol Preprint. bio-protocol.org/prep391.
Blanquie, O., Yang, J., Kilb, W., Sharopov, S., Sinning, A. and Luhmann, H. J.(2017). Electrical activity controls area-specific expression of neuronal apoptosis in the mouse developing cerebral cortex. eLIFE. DOI: 10.7554/eLife.27696