More Variations on Shuffle Squares. - Jaroslaw Grytczuk; Bartlomiej Pawlik; Mariusz Pleszczynski (Symmetry, 2023)

Extensions and reductions of squarefree words. - Michal Debski; Jaroslaw Grytczuk; Bartlomiej Pawlik (Discret. Math., 2024)

Shuffle Squares and Nest-Free Graphs. - Jaroslaw Grytczuk; Bartlomiej Pawlik; Andrzej Rucinski 001 (WORDS, 2025)