On the dynamics of the general Bianchi IX spacetime near the singularity Claus Kiefer, Nick Kwidzinski and Włodzimierz Piechocki Eur. Phys. J. C, 78 9 (2018) 691 Published online: 30 August 2018 DOI: 10.1140/epjc/s10052-018-6155-8