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

Koppolu, R(2021). Barley spikelet morphometry analysis. Bio-protocol Preprint. bio-protocol.org/prep1075.
Thiel, J., Koppolu, R., Trautewig, C., Hertig, C., Kale, S. M., Erbe, S., Mascher, M., Himmelbach, A., Rutten, T., Esteban, E., Pasha, A., Kumlehn, J., Provart, N. J., Vanderauwera, S., Frohberg, C. and Schnurbusch, T.(2021). Transcriptional landscapes of floral meristems in barley. Science Advances 7(18). DOI: 10.1126/sciadv.abf0832