Semantic Gap Detection in Metadata of Adaptive Learning Environments. - Sergey A. Sosnovsky; Isaac Alpizar Chacon (ICALT, 2014)

Interlingua: Linking Textbooks Across Different Languages. - Isaac Alpizar Chacon; Sergey A. Sosnovsky (iTextbooks@AIED, 2019)

Expanding the Web of Knowledge: One Textbook at a Time. - Isaac Alpizar Chacon; Sergey A. Sosnovsky (HT, 2019)

Transformation of PDF Textbooks into Intelligent Educational Resources. - Isaac Alpizar Chacon; Max van der Hart; Zef S. Wiersma; Lorenzo Theunissen; Sergey A. Sosnovsky (iTextbooks@AIED, 2020)

Order out of Chaos: Construction of Knowledge Models from PDF Textbooks. - Isaac Alpizar Chacon; Sergey A. Sosnovsky (DocEng, 2020)

Integrating Textbooks with Smart Interactive Content for Learning Programming. - Isaac Alpizar Chacon; Jordan Barria-Pineda; Kamil Akhuseyinoglu; Sergey A. Sosnovsky; Peter Brusilovsky (iTextbooks@AIED, 2021)

Generation of Assessment Questions from Textbooks Enriched with Knowledge Models. - Lucas Dresscher; Isaac Alpizar Chacon; Sergey A. Sosnovsky (iTextbooks@AIED, 2021)

Knowledge models from PDF textbooks. - Isaac Alpizar Chacon; Sergey A. Sosnovsky (New Rev. Hypermedia Multim., 2021)

Enriching Intelligent Textbooks with Interactivity: When Smart Content Allocation Goes Wrong. - Alireza Javadian Sabet; Isaac Alpizar Chacon; Jordan Barria-Pineda; Peter Brusilovsky; Sergey A. Sosnovsky (iTextbooks@AIED, 2022)

What's in an Index: Extracting Domain-specific Knowledge Graphs from Textbooks. - Isaac Alpizar Chacon; Sergey A. Sosnovsky (WWW, 2022)

Measuring the Quality of Domain Models Extracted from Textbooks with Learning Curves Analysis. - Isaac Alpizar Chacon; Sergey A. Sosnovsky; Peter Brusilovsky (AIED, 2023)

Harnessing Textbooks for High-Quality Labeled Data: An Approach to Automatic Keyword Extraction. - Lorenzo Pozzi; Isaac Alpizar Chacon; Sergey A. Sosnovsky (iTextbooks@AIED, 2023)

Extraction of Knowledge Models from Textbooks. - Isaac Alpizar Chacon (2023)

Designing a Pedagogical Framework for Developing Abstraction Skills. - Marjahan Begum; Julia Crossley; Filip Strömbäck; Eleni C. Akrida; Isaac Alpizar Chacon; Abigail Evans; Joshua B. Gross; Pontus Haglund; Violetta Lonati; Chandrika Satyavolu; Sverrir Thorgeirsson (ITiCSE (2), 2024)

A Pedagogical Framework for Developing Abstraction Skills. - Marjahan Begum; Julia Crossley; Filip Strömbäck; Eleni C. Akrida; Isaac Alpizar Chacon; Abigail Evans; Joshua B. Gross; Pontus Haglund; Violetta Lonati; Chandrika Satyavolu; Sverrir Thorgeirsson (ITiCSE-WGR, 2024)

Students' Perceptions and Use of Generative AI Tools for Programming Across Different Computing Courses. - Hieke Keuning; Isaac Alpizar Chacon; Ioanna Lykourentzou; Lauren Beehler; Christian Köppe; Imke de Jong; Sergey A. Sosnovsky (Koli Calling, 2024)

Extraction of Knowledge Models from Textbooks. - Isaac Alpizar Chacon (SIGWEB Newsl., 2024)

Student's Use of Generative AI as a Support Tool in an Advanced Web Development Course. - Isaac Alpizar Chacon; Hieke Keuning (ITiCSE (1), 2025)