On first-fit coloring of ladder-free posets. - Hal A. Kierstead; Matt Earl Smith (Eur. J. Comb., 2013)

An Improved Subexponential Bound for On-line Chain Partitioning. - Bartlomiej Bosek; Hal A. Kierstead; Tomasz Krawczyk; Grzegorz Matecki; Matthew E. Smith 001 (CoRR, 2014)

An Easy Subexponential Bound for Online Chain Partitioning. - Bartlomiej Bosek; Hal A. Kierstead; Tomasz Krawczyk; Grzegorz Matecki; Matthew E. Smith 001 (Electron. J. Comb., 2018)