.. _references::

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References
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.. [Evenden1995] Evenden, G. I., 1995, `Cartograpic Projection Procedures for the UNIX Environment - A User's Manual <https://github.com/OSGeo/proj.4/blob/master/docs/old/proj_4_3_12.pdf>`_

.. [Evenden2005] Evenden, G. I., 2005, `libproj4: A Comprehensive Library of Cartographic Projection Functions (Preliminary Draft) <https://github.com/OSGeo/proj.4/blob/master/docs/old/libproj.pdf>`_

.. [Steers1970] Steers, J.A., 1970, An introduction to the study of map projections (15th ed.): London, Univ. London Press, p. 229

.. [Snyder1987] Snyder. John P. 1987. `Map Projections - A Working Manual <https://github.com/OSGeo/proj.4/blob/master/docs/old/USGS-Snyder-Map-Projections-A-Working-Manual-1987.pdf>`__. US. Geological Survey professional paper; 1395.