Reference

D. S. Choi, C. H. Lee, M. Kayama, H. O. Jin, Y. C. Kim (2005): Growth of Korean Pine Seedlings Planted in Granite-forest Soil Treated with H2SO4 ,HNO3 and HCL Solution. – Phyton, Annales Rei Botanicae, Horn – 45_4: 157 - 162.