Husyan Pour Shad, M. “Angle Trisection: 1.What Is Angle Trisection? 2.How To Do Angle Trisection? 3.Why Do Angle Trisection?”. JOURNAL OF ADVANCES IN MATHEMATICS, vol. 17, Sept. 2019, pp. 165-31, doi:10.24297/jam.v17i0.8412.