NLU Methodologies for Capturing Non-redundant Information from Multi-documents - A Survey. - Michael T. Mills; Nikolaos G. Bourbakis (ICSOFT (2), 2010)

A Comparative Survey on NLP/U Methodologies for Processing Multi-Documents. - Michael T. Mills; Nikolaos G. Bourbakis (Int. J. Artif. Intell. Tools, 2012)

Converting Natural Language Text Sentences into SPN Representations for Associating Events. - Nikolaos G. Bourbakis; Michael T. Mills (Int. J. Semantic Comput., 2012)

Modeling Natural Language Sentences into SPN Graphs. - Michael T. Mills; Adamantia Psarologou; Nikolaos G. Bourbakis (ICTAI, 2013)

Graph-Based Methods for Natural Language Processing and Understanding - A Survey and Analysis. - Michael T. Mills; Nikolaos G. Bourbakis (IEEE Trans. Syst. Man Cybern. Syst., 2014)