Todhunter, I[saac], 1820-1884 ;  Z̲akāʾullāh, Muḥammad (1871) An elementary treatise on the theory of equations, with a collection of examples ۔۔۔Risālah-yi masāʼil muʻādalāt : maʻah buhat sī mis̲ālon̲ ke. Mat̤baʻ-i Murtaẓavī. ISBN: .