Poonchayar Patthanangkoor และ Konkanok Promjabok; Kotchaporn Promjabok; Warunya Wong-u-ra. (2023) Formulas of the Exponential Matrix for Some Real Semi Skew-Symmetric Matrices of Order 4. <i>Thai Science and Technology Journal</i>, <i>31</i>(3), 46-56.Poonchayar Patthanangkoor และ Konkanok Promjabok; Kotchaporn Promjabok; Warunya Wong-u-ra. "Formulas of the Exponential Matrix for Some Real Semi Skew-Symmetric Matrices of Order 4". Thai Science and Technology Journal 31 (2023):46-56.Poonchayar Patthanangkoor และ Konkanok Promjabok; Kotchaporn Promjabok; Warunya Wong-u-ra. Formulas of the Exponential Matrix for Some Real Semi Skew-Symmetric Matrices of Order 4. Research Division:ม.ป.ท. 2023.