Research Paper: Modeling Multi-typed Structurally Viewed Chemicals with the UMLS Refined Semantic Network. - Ling Chen 007; C. Paul Morrey; Huanying Gu; Michael Halper; Yehoshua Perl (J. Am. Medical Informatics Assoc., 2009)

Resolution of redundant semantic type assignments for organic chemicals in the UMLS. - C. Paul Morrey; Ling Chen 007; Michael Halper; Yehoshua Perl (Artif. Intell. Medicine, 2011)

A chemical specialty semantic network for the Unified Medical Language System. - C. Paul Morrey; Yehoshua Perl; Michael Halper; Ling Chen 007; Huanying Gu (J. Cheminformatics, 2012)

A Quality-Assurance Study of ChEBI. - Hasan Yumak; Ling Chen 007; Michael Halper; Ling Zheng; Yehoshua Perl; Gai Elhanan (ICBO/BioCreative, 2016)

Quality assurance of chemical ingredient classification for the National Drug File - Reference Terminology. - Ling Zheng; Hasan Yumak; Ling Chen 007; Christopher Ochs; James Geller; Joan Kapusnik-Uner; Yehoshua Perl (J. Biomed. Informatics, 2017)

A Quality Assurance Methodology for ChEBI Ontology Focusing on Uncommonly Modeled Concepts. - Hao Liu 025; Ling Chen 007; Ling Zheng; Yehoshua Perl; James Geller (ICBO, 2018)

Quality assurance of complex ChEBI concepts based on number of relationship types. - Hasan Yumak; Ling Zheng; Ling Chen 007; Michael Halper; Yehoshua Perl; Gareth Owen (Appl. Ontology, 2019)