Noncommutative Pieri Operators on Posets. - Nantel Bergeron; Stefan Mykytiuk; Frank Sottile; Stephanie van Willigenburg (J. Comb. Theory A, 2000)

Shifted quasi-symmetric functions and the Hopf algebra of peak functions. - Nantel Bergeron; Stefan Mykytiuk; Frank Sottile; Stephanie van Willigenburg (Discret. Math., 2002)

On the Appearance of Moving Bodies. - Andrzej Nowojewski; Jakub Kallas; Andrzej Dragan; Abe Shenitzer; Stefan Mykytiuk; John Stillwell (Am. Math. Mon., 2004)