[1] Cronan, C. S. (1991). Differential Adsorption of Al, Ca, and Mg by Roots of Red Spruce (Picea rubens Sarg.). Tree Physiology, 8, 227-237. http://dx.doi.org/10.1093/treephys/8.3.227
[2] De Vries, W., Vel, E., Reinds, G. J., Deelstra, H., Klap, J. M., Leeters, E. E. J. M., Hendriks, C. M. A., Kerkvoorden, M., Landmann, G., Herkendell, J., Haussmann, T., & Erisman, J. W. (2003). Intensive Monitoring of Forest Ecosystems in Europe 1. Objectives, Set-Up and Evaluation Strategy. Forest Ecology and Management, 174, 77-95.
http://dx.doi.org/10.1016/S0378-1127(02)00029-4
[3] Dobbertin, M. (2005). Tree Growth as Indicator of Tree Vitality and of Tree Reaction to Environmental Stress: A Review. European Journal of Forest Research, 124, 319-333.
http://dx.doi.org/10.1007/s10342-005-0085-3
[4] Drobyshev, I., Anderson, S., & Sonesson, K. (2007). Crown Condition Dynamics of Oak in Southern Sweden 1988-1999. Environmental Monitoring and Assessment, 134, 199-210.
http://dx.doi.org/10.1007/s10661-007-9610-9
[5] Jonard, M., Legout, A., Nicolas, M., Dambrine, E., Ulrich, C. N. E., van der Perre, R., & Ponette, Q. (2011). Deterioration of Norway Spruce Vitality Despite a Sharp Decline in Acid Deposition: A Long-Term Integrated Perspective. Global Change Biology, 18, 711-725. http://dx.doi.org/10.1111/j.1365-2486.2011.02550.x
[6] Kandler, O. (1992). Historical Declines and Diebacks of Central European Forests and Present Conditions. Environmental Toxicology and Chemistry, 11, 1077-1093.
http://dx.doi.org/10.1002/etc.5620110805
[7] Kandler, O., & Miller, W. (1990/1991). Dynamics of “Acute Yellowing” in Spruce Connected with Mg Deficiency. Water, Air, and Soil Pollution, 54, 21-34. http://dx.doi.org/10.1007/BF00298650
[8] Klap, J. N., Voshaar, J. H. O., Vries, W. D., & Erisman, J. W. (2000). Effects of Environmental Stress on Forest Crown Condition in Europe. Part IV: Statistical Analysis of Relationships. Water, Air, and Soil Pollution, 119, 387-420.
http://dx.doi.org/10.1023/A:1005157208701
[9] Mehlhorn, H., Francis, B. J., & Wellburn, A. R. (1988). Prediction of the Probability of Forest Decline Damage to Norway Spruce Using Three Simple Site-Independent Diagnostic Parameters. New Phytologist, 110, 525-534.
http://dx.doi.org/10.1111/j.1469-8137.1988.tb00292.x
[10] Nashimoto, M., & Takahashi, K. (1991). Decline of Japanese Cedar (Cryptomeria japonica D. Don) Trees in the Kanto-Koshin and Kansai-Setouchi District. Japanese Journal for Environ, 32, 70-78.
[11] Ozolincius, R., & Stakenas, V. (1996). Tree Crown Defoliation: Influencing Factors. Baltic Forestry, 2, 48-55.
[12] Takahashi, K., Okitsu, S., & Ueda, H. (1986). Acid Deposition and Japanese Cedar Decline in Kanto Region, Japan. Japanese Journal for Environ, 28, 11-17.
[13] The Japan Dam Foundation (2014). Dams in Japan.
http://damnet.or.jp/Dambinran/binran/TopIndex_en.html
[14] Yambe, Y. (1973). Declining of Trees in Tokyo. Bulletin of FFPRI, 257, 101-107.
http://www.ffpri.affrc.go.jp/labs/kanko/257-4.pdf
[15] Yambe, Y. (1978). Declining of Trees and Microbial Florae as the Index of Pollution in Some Urban Areas. Bulletin of FFPRI, 301, 119-129. http://www.ffpri.affrc.go.jp/labs/kanko/301-4.pdf