1. Weatherburn, G.E., Differential Geometry of Three Dimensions, Cambridge at the University Press, 1955.
2. Willmore, T.J., An Introduction to Differential Geometry, Delhi, India: Oxford University Press, 1959.
3. Struik, D.J., Lectures on Classical Differential Geometry: Second Edition, Addison- Wesley Publishing Co., Massachusetts, 1961
4. O’Neill, B., Elementary Differential Geometry. New York, NY, USA: Academic Press Inc., 1966.
5. Lipschutz, M.M., Theory and Problems Of Differential Geometry, New York, St. Louis, San Francisco, Toronto, Sydney, 1969.