APPROACH TO CHEMICAL SHIFT SUM OF 13C NMR SPECTROSCOPY IN ALKANES BASED ON A NOVEL MOLECULAR GRAPH THEORETICAL INDEX M
SHEN Qi-ting, YU Ban-mei, YUAN Xiao-yan, ZHANG Meng-jun, LI Zhi-liang
Chinese Journal of Magnetic Resonance . 2000, (6): 469 -474 .