- Jon Alkorta, Itziar Gonzalez-Dios, Aitziber Atutxa, Koldo Gojenola, Eugenio Martínez-Cámara, Álvaro Rodrigo, Paloma Martínez, editors, Proceedings of the Annual Conference of the Spanish Association for Natural Language Processing: Projects and Demonstrations (SEPLN-PD 2021) co-located with the Conference of the Spanish Society for Natural Language Processing (SEPLN 2021), Málaga, Spain, September, 2021. Volume 2968 of CEUR Workshop Proceedings, CEUR-WS.org, 2021.
- Manuel Montes, Paolo Rosso, Julio Gonzalo, Mario Ezra Aragón, Rodrigo Agerri, Miguel Ángel Álvarez Carmona, Elena Álvarez Mellado, Jorge Carrillo-de-Albornoz, Luis Chiruzzo, Larissa A. de Freitas, Helena Gómez-Adorno, Yoan Gutiérrez, Salud María Jiménez Zafra, Salvador Lima, Flor Miriam Plaza del Arco, Mariona Taulé, editors, Proceedings of the Iberian Languages Evaluation Forum (IberLEF 2021) co-located with the Conference of the Spanish Society for Natural Language Processing (SEPLN 2021), XXXVII International Conference of the Spanish Society for Natural Language Processing., Málaga, Spain, September, 2021. Volume 2943 of CEUR Workshop Proceedings, CEUR-WS.org, 2021.
- Horacio Saggion, Sanja Stajner, Daniel Ferrés, Kim Cheng Sheang, editors, Proceedings of the First Workshop on Current Trends in Text Simplification (CTTS 2021) co-located with the 37th Conference of the Spanish Society for Natural Language Processing (SEPLN2021), Online (initially located in Málaga, Spain), September 21st, 2021. Volume 2944 of CEUR Workshop Proceedings, CEUR-WS.org, 2021.