Tham khảo Cây_thường_xanh

  1. ↑ Ewers, F. W. & Schmid, R. (1981). "Longevity of needle fascicles of Pinus longaeva (Bristlecone Pine) and other North American pines". Oecologia 51: 107–115
  2. ↑ Aerts, R. (1995). "The advantages of being evergreen". Trends in Ecology & Evolution 10 (10): 402–407.
  3. ↑ Matyssek, R. (1986) "Carbon, water and nitrogen relations in evergreen and deciduous conifers". Tree Physiology 2: 177–187.
  4. ↑ Sobrado, M. A. (1991) "Cost-Benefit Relationships in Deciduous and Evergreen Leaves of Tropical Dry Forest Species". Functional Ecology 5 (5): 608–616.