Shellability of Complexes of Trees. - Henryk Trappmann; Günter M. Ziegler (J. Comb. Theory A, 1998)

Portrait of the four regular super-exponentials to base sqrt(2). - Dmitrii Kouznetsov; Henryk Trappmann (Math. Comput., 2010)

Computation of the two regular super-exponentials to base exp(1/e). - Henryk Trappmann; Dmitrii Kouznetsov (Math. Comput., 2012)