BENSCHOP, M. Photosynthesis and respiration of Tulipa sp. culivar 'Apeldoorn'. Scientia Hortic. 1980, 12, 361-375
CHARLES-EDWARDS, D. A. An analysis of the growth of forced tulips. 2. Effects of low-temperature treatments during development on plant structure at anthesis. Scientia Hortic. 1975, 3, 373-381
CHARLES-EDWARDS, D. A. Tulip forcing model and reality. Acta Hor. 1975, 47, 365-370