Algebraic geometry. - Robin Hartshorne (Springer, 1977)

Non-Euclidean III.36. - Robin Hartshorne (Am. Math. Mon., 2003)

Review: Continuous Symmetry: From Euclid to Klein. American Mathematical Society, Providence, RI, 2007, xxi + 546 pp., ISBN 978-0821839003, $69. by William Barker and Roger Howe. - Robin Hartshorne (Am. Math. Mon., 2011)

Reviews. - Jeffrey Nunemacher; Robin Hartshorne (Am. Math. Mon., 2015)