Urs Schreiber, a postdoctoral researcher at the University of Hamburg, noted that the mention of the Foucault pendulum was at odds with the papers' general tone, since they generally relied upon more "modern terminology".
Damien Calaque of the Louis Pasteur University, Strasbourg, commented adversely about Grichka Bogdanov's unpublished preprint "Construction of cocycle bicrossproducts by twisting".