Ravaska, T. (1980). On a theory of surfaces based on tangent spaces of the second kind.
Chicago Style (17th ed.) CitationRavaska, Timo. On a Theory of Surfaces Based on Tangent Spaces of the Second Kind. 1980.
MLA (9th ed.) CitationRavaska, Timo. On a Theory of Surfaces Based on Tangent Spaces of the Second Kind. 1980.
Warning: These citations may not always be 100% accurate.