Volume 9 Number 1 & 2, 2021 (Current Issue) Approximate Solution of Damped Forced and Damped Oscillatory Motion of Differential Equation of Nonlinear Differential Systems with Varying Parameter Md. Asaduzzaman, Rezaul Karim and Pinakee Dey Pages 1-7 Download Lie Group Analysis, Optimal System and Exact Solutions of a Class of Fifth-Order Nonlinear Evolution Equation Yan-xin Hu, Zeng-xin Guo and Xiang-peng Xin Pages 9-23 Download Fire Services: The Technicalities and the Logistics Involved Adebisi Sunday Adesina Pages 25-35 Download A Distribution Model Related to the Dairy Industry of Sri Lanka H.H.M.I. Kumara Pages 37-44 Download