1. Some factors for tuberization in the potato plant;Gregory;Amer. Jour. Bot.,1956
2. Vernalization in peas;Highkin;Plant Physiol.,1956a
3. Temperature-induced variability in the growth and development of pea plants;Highkin;Plant Physiol.,1956b
4. Krijthe , Neeltje 1948 Influence of temperature and light on the early potato “Eersteling” under storage conditions Versl. Landbouwk. Onderz. 54 1 40