How to Compare Buchholz-Style Ordinal Notation Systems with Gordeev-Style Notation Systems. - Jeroen Van der Meeren; Andreas Weiermann (CiE, 2015)

Well-partial-orderings and the big Veblen number. - Jeroen Van der Meeren; Michael Rathjen; Andreas Weiermann (Arch. Math. Log., 2015)

Reverse mathematics, well-quasi-orders, and Noetherian spaces. - Emanuele Frittaion; Matthew Hendtlass; Alberto Marcone; Paul Shafer; Jeroen Van der Meeren (Arch. Math. Log., 2016)

An order-theoretic characterization of the Howard-Bachmann-hierarchy. - Jeroen Van der Meeren; Michael Rathjen; Andreas Weiermann (Arch. Math. Log., 2017)

Ordinal notation systems corresponding to Friedman's linearized well-partial-orders with gap-condition. - Michael Rathjen; Jeroen Van der Meeren; Andreas Weiermann (Arch. Math. Log., 2017)