1.
Albertson MO, Chappell GG, Kierstead HA, Kündgen A, Ramamurthi R. Coloring with no $2$-Colored $P_4$’s. Electron. J. Combin. [Internet]. 2004Mar.31 [cited 2026Mar.28];11(1):R26. Available from: https://www.combinatorics.org/ojs/index.php/eljc/article/view/v11i1r26