1. T Akiyama, and K Kawamura (2004 ) Methodology development using remote sensing, GIS and GPS for grassland management. Proc Japan-Korea-China Symposium on Grassland Agriculture and Animal Production, pp. 30 -34 .
2. T Akiyama, K Kawamura, H Yokota, and Z Chen (2005 ) Grassland monitoring system for sustainable utilization in Inner Mongolia, China. 1. Concept of real-time monitoring system and estimation of biomass using NOAA/NDVI . Proc 20th IGC, 886 -887 .