Coba jelasin Buku karya O. Veblen dari Oswald Veblen dong

Introduction to infinitesimal analysis; functions of one real variable with N. J. Lennes (John Wiley & Sons, 1907)

Projective geometry with John Wesley Young (Ginn and Co., Vol. 1, 1910; Vol. 2, 1918)

Analysis Situs (American Mathematical Society, 1922; 2nd edn. 1931)

Invariants of Quadratic Differential Forms (Cambridge University Press, 1927)

The Foundations of Differential Geometry with J. H. C. Whitehead (Cambridge University Press, 1932)

Projektive Relativitätstheorie (Springer Verlag, 1933)