MILORD: The architecture and the management of linguistically expressed uncertainty. - Lluís Godo; Ramón López de Mántaras; Carlos Sierra; Albert Verdaguer (Int. J. Intell. Syst., 1989)

RENOIR: An expert system using fuzzy logic for rheumatology diagnosis. - Miguel Belmonte-Serrano; Carlos Sierra; Ramón López de Mántaras (Int. J. Intell. Syst., 1994)

Functional data analysis as a tool to correlate textural and geochemical data. - Celestino Ordóñez; Carlos Sierra; Teresa Albuquerque; José Luis R. Gallego (Appl. Math. Comput., 2013)

Evolution of Bus Shuttle Service in Madrid Towards Autonomous Operation, A Practical Use Case. - Ángel Madridano; Sergio Campos; Joshué Manuel Pérez; Alfredo Valle; Diego Martín; Ray Alejandro Lattarulo; Miguel Ángel de Miguel; Carlos Sierra; Julián Del Olmo; César Omar Chacón; Felipe Jiménez; José Eugenio Naranjo; et al. (ITSC, 2023)