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Lua i Stíl Chicago (17ú heag.)Havil, Julian. GAMMA: EXploring Euler`s Constant. 1st. Hyderabad: ICFAI University Press, 2005.
Lua MLA (9ú heag.)Havil, Julian. GAMMA: EXploring Euler`s Constant. 1st. ICFAI University Press, 2005.
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