Fix DOI reference in docstring
@@ -1226,7 +1226,8 @@ class BPoly(_PPolyBase):
.. [2] Kenneth I. Joy, Bernstein polynomials,
http://www.idav.ucdavis.edu/education/CAGDNotes/Bernstein-Polynomials.pdf
.. [3] E. H. Doha, A. H. Bhrawy, and M. A. Saker, Boundary Value Problems,
- vol 2011, article ID 829546, :doi:`10.1155/2011/829543`.
+ vol 2011, article ID 829546,
+ `10.1155/2011/829543 <https://doi.org/10.1155/2011/829543>`_.
Examples
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