Update References.md

Author: abougouffa

docs/References.md

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 - [3] Meeus, Jean, _Astronomical Algorithms_, ISBN:0-943396-35-2, [pdf version](http://www.agopax.it/Libri_astronomia/pdf/Astronomical%20Algorithms.pdf).
 - [4] Bilani, Hassan, _A Geodetic Study For Determining of Qibla Direction_, 2001, [article](http://www.icoproject.org/pdf/bilani_2003.pdf).
 - [5] Abed, Abdelkader, _An opinion for determining qiblah direction in places far from Makkah_, [article](http://www.icoproject.org/article/abed_qiblah.html).
-- [6] _Islamic inheritance calculator, [article](http://inheritance.ilmsummit.org/projects/inheritance/rules.aspx).
+- [6] _Islamic inheritance calculator_, [article](http://inheritance.ilmsummit.org/projects/inheritance/rules.aspx).
 - [7] Sheikh Salah Najib Alddaq, _Ahkam al mawarith_, 2017, [article](https://www.alukah.net/sharia/0/123808/).
 - [8] Haytham Aamayra, _Ma howa annisab fi zakat_, 2016, [article](https://mawdoo3.com/%D9%85%D8%A7_%D9%87%D9%88_%D8%A7%D9%84%D9%86%D8%B5%D8%A7%D8%A8_%D9%81%D9%8A_%D8%A7%D9%84%D8%B2%D9%83%D8%A7%D8%A9#.D8.B2.D9.83.D8.A7.D8.A9_.D8.A7.D9.84.D8.A3.D9.85.D9.88.D8.A7.D9.84).
 - [9]  _Zakat on agricultural products_, 2018, [article](https://www.islamweb.net/en/article/139046/zakat-on-agricultural-products).