1. Ring ridge hummocky moraines in northern Finland;Aartolahti;Fennia,1974
2. Impulse radar sounding in permafrost;Annan;Radio Sci.,1976
3. ASTM C136 / C136M-14, Standard Test Method for Sieve Analysis of Fine and Coarse Aggregates, ASTM International, West Conshohocken, PA;ASTM Standard,2014
4. Glaciers and Glaciation;Benn,2010
5. Hydrodynamic blowouts in North Dakota;Bluemle,1993