1. The occurrence of forms of Norway spruce based on branching habit;Alexandrov;Silvae Genet.,1971
2. Crown characteristics of tropical trees;Ashton,1978
3. The hexagonal branching pattern of rhizomes of Alpinia speciosa L. (Zingiberaceae);Bell;Ann. Bot.,1979
4. Adaptive architecture in rhizomatous plants;Bell;Bot. J. Linn. Soc.,1980