Jarillo, J., del Olmo, I., Gómez-Zambrano, A., Lázaro, A., López-González, L., Miguel, E., Narro-Diego, L., Sáez, D. and Piñeiro, M. 2008. Photoperiodic control of flowering time: a review. Spanish Journal of Agricultural Research. 6, S1 (Feb. 2008), 221-244. DOI:https://doi.org/10.5424/sjar/200806S1-391.