Morilla, L.J. G., Manting, M.M.E. and Demayo, C.G. 2017. Intrafamilial Pinna Shape Variations of Fern Species Under Family Thelypteridaceae and Nephrolepidaceae Using Elliptic Fourier Analysis. Journal of Informatics and Mathematical Sciences. 9, 4 (Dec. 2017), 1087–1093. DOI:https://doi.org/10.26713/jims.v9i4.1010.