User talk:Dreiche2
Carlo de Papa and Hans Grassmann are two university professors (physics), and they do not present any new and original research, but simply refer to material found in wikipedia. Why do you think this is an unreliable source?
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Carlo de Papa and Hans Grassmann are two university professors (physics), and they do not present any new and original research, but simply refer to material found in wikipedia. Why do you think this is an unreliable source?