• Bulletin of the Korean Space Science Society
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• 2008.04a
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• pp.30.4-31
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• 2008

• Proceedings of the Korean Society of Food Hygiene and Safety Conference
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• 2005.11a
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• pp.174-195
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• 2005

• Proceedings of the Korean Society of Fisheries Technology Conference
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• 2009.05a
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• pp.29-33
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• 2009

• Proceedings of the Korean Radioactive Waste Society Conference
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• 2008.05a
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• pp.276-277
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• 2008

• Communications of the Korean Institute of Information Scientists and Engineers
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• v.36 no.2
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• pp.37-42
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• 2018

• Communications of the Korean Mathematical Society
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• v.12 no.2
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• pp.365-371
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• 1997

We prove some relation of volume with the covering radius of Riemannian manifolds and reprove well-known sphere rigidity theorems by using it.

• Magazine of korean Tunnelling and Underground Space Association
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• v.11 no.4
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• pp.58-66
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• 2009

• Proceedings of the Korean Radioactive Waste Society Conference
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• 2007.05a
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• pp.177-178
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• 2007

• Proceedings of the Korean Radioactive Waste Society Conference
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• 2007.05a
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• pp.249-250
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• 2007

• Proceedings of the Korean Nutrition Society Conference
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• 2004.05a
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• pp.108-108
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• 2004