Martin Kieffer; Michael P. Fuller; Anita J. Jellings (July 1998). "Explaining Curd and Spear Geometry in Broccoli, Cauliflower and 'Romanesco': Quantitative Variation in Activity of Primary Meristems". Planta. 206 (1): 34–43. doi:10.1007/s004250050371. S2CID39949892.
Martin Kieffer; Michael P. Fuller; Anita J. Jellings (July 1998). "Explaining Curd and Spear Geometry in Broccoli, Cauliflower and 'Romanesco': Quantitative Variation in Activity of Primary Meristems". Planta. 206 (1): 34–43. doi:10.1007/s004250050371. S2CID39949892.