Glen Van Brummelen

ISBN 1-56881-141-1.  Thiele, Rüdiger. On Hilbert and his twenty-four problems. Van Brummelen, Glen (编). Mathematics and the historian’s craft. The Kenneth O. May Lectures

Association (REA). December 1978: 359. ISBN 978-0-87891-510-1.  van Brummelen, Glen Robert. Heavenly Mathematics: The Forgotten Art of Spherical Trigonometry

\cos(a-b)=\cos(a)\cos(b)+\sin(a)\sin(b)} ，半正矢定理就能推出。 视觉算法（英语：sight reduction） van Brummelen, Glen Robert. Heavenly Mathematics: The Forgotten Art of Spherical Trigonometry

Logarithmic and Trigonometric Tables (Macmillan, New York, 1913). van Brummelen, Glen Robert. Heavenly Mathematics: The Forgotten Art of Spherical Trigonometry

1441905499, 978-1-4419-0549-9. （原始内容存档于2016-06-24）.  (See errata.) van Brummelen, Glen Robert. Heavenly Mathematics: The Forgotten Art of Spherical Trigonometry