|  | 
              
                | Kirjallisuusviitteet |  
                | 
                    
                      | 
                          
                            A. Väinölä, O. Jussila. Alppiruusut. Kustannusosakeyhtiö Tammi, 2002.
 
                            Kenneth Cox. Rhododendrons: A Care Manual. Laurel Glenn Publishing, 1998.
 
                            Peter A. Cox. The Cultivation of Rhododendrons. Batsford Ltd, 1994.
 
                            Peter A. Cox. The Larger Rhododendron Species. Timber Press, 1990.
 
                            A.Väinölä. Genetic and physiological
                            aspects of cold hardiness in Rhododendron. University of Helsinki, 2000.
 
                            Robert S. Pearce. Plant Freezing and Damage. Annals of Botany 87:417-424,
                            2001.
 
                            T. Anisko, O. Lindstrom. Inducing Acclimation of Azaleas by Reducing
                            Water Supply. SNA Research Conference - Vol. 39-1994.
 
                            T. Anisko, O. Lindstrom. The Effect of Reduced Water Supply on Cold
                            Hardiness of Rhododendron 'Catawbiense Boursault'. SNA Research Conference - Vol. 38-1993.
 
                            M. Ishikawa, H. Ide, W. S. Price, Y. Arata, T. Kitashima. Freezing
                            behaviours in plant tissues visualized by NMR microscopy and their regulatory mechanisms. JIRCAS/IPGRI Workshop on Cryopreservation of tropical plant germplasm, Japan
                            1998.
 
                            M. A. Rose, E. Smith. Overwintering Plants in the Landscape. Ohio State
                            University Fact Sheet HYG-1019-96. 1996.
 
                            S. M. Douglas. Winter Injury and Drying of
                            Rhododendron. The Connecticut Agricultural Experiment Station. Fact Sheet File PP055 (12/97R). 1997.
 
                            J. Iles. How Woody Plants Survive Extreme Cold. Iowa State
                            University. Horticulture ∓ Home Pest News. 1997.
 
                            H. Hardy. Three Aspect of Hardiness.
                            Rhododendron and Azalea News, March 1999.
 
                            ARS Hardiness Information and Definitions.
                            1999.
 
                            J. B. Parks. How Should Hardiness Be Defined? The Rosebay, ARS Massachusetts
                            Chapter.
 
                            S. Perkins. Healthy, Hardy and Wise? The Rosebay, ARS Massachusetts
                            Chapter.
 
 |  |  |