Abbasi, M. U.-H., and S. R. Sarma. β€œAn Astrolabe by Muhammad Muqim of Lahore Dated 1047 AH (1637–38 CE)”. Islamic Studies, Vol. 53, no. 1-2, May 2018, http://irigs.iiu.edu.pk:64447/ojs/index.php/islamicstudies/article/view/178.