Andi Makarim Katili &  Irwan Katili. (2020). FEA Versus IGA in a Two-Node Beam Element Based on Unified and Integrated Method.
            <i>Advances in Applied Mathematics and Mechanics</i>. <i>12</i> (6).
            1565-1586.
         doi:10.4208/aamm.OA-2018-0255