“SEED COAT SURFACE ELEMENTAL COMPOSITIONS OF ACCELERATED AGED SEEDS OF PINUS TAEDA AND PINUS ROXBURGHII BY ENERGY-DISPERSIVE X-RAY SPECTROSCOPY”. JOURNAL OF TROPICAL FOREST SCIENCE, vol. 10, no. 3, Mar. 1998, pp. 297-03, https://jtfs.frim.gov.my/jtfs/article/view/1618.