Perturbed Collocation Method For Solving Singular Multi-order Fractional Differential Equations of Lane-Emden Type. J. Nig. Soc. Phys. Sci. [Internet]. 2020 Aug. 1 [cited 2024 Nov. 23];2(3):141-8. Available from: https://journal.nsps.org.ng/index.php/jnsps/article/view/69