Automated essay content analysis based on Concept Indexing with Fuzzy C-means clustering. - Abigail R. Razon; Ma. Lourdes J. Vargas; Rowena Cristina L. Guevara; Prospero C. Naval (APCCAS, 2010)

A New Approach to Automated Text Readability Classification based on Concept Indexing with Integrated Part-of-Speech n-gram Features. - Abigail R. Razon; John A. Barnden (RANLP, 2015)

An automated learner-based reading ability estimation strategy using concept indexing with integrated Part-of-Speech n-gram features. - Abigail R. Razon (2017)