Improved Lower Bound for Competitive Graph Exploration. - Alexander Birx; Yann Disser; Alexander V. Hopp; Christina Karousatou (CoRR, 2020)

Tight Analysis of the Smartstart Algorithm for Online Dial-a-Ride on the Line. - Alexander Birx; Yann Disser (SIAM J. Discret. Math., 2020)

An improved lower bound for competitive graph exploration. - Alexander Birx; Yann Disser; Alexander V. Hopp; Christina Karousatou (Theor. Comput. Sci., 2021)

Improved Bounds for Open Online Dial-a-Ride on the Line. - Alexander Birx; Yann Disser; Kevin Schewior (Algorithmica, 2023)