Two journal papers are added

– Chathumi Ayanthi KavirathnaRyuichi Shibasaki, Economic feasibility of Arctic shipping from multiple perspectives: a systematic review, Okhotsk Sea and Polar Oceans Research, 5, 2021 (accepted)

– Takuya YamaguchiRyuichi Shibasaki, Hiroyuki Samizo, Hisanari Ushirooka, Impact on Myanmar’s Logistics Efficiency of the East–West and Southern Corridor Development of the Greater Mekong Subregion – A Global Logistics Intermodal Network SimulationSustainability, 13(2), 668, 2021 doi: 10.3390/su13020668