Supplement to the paper 'A collection of 505 papers on false or unconfirmed ferroelectric properties in single crystals, ceramics and polymers [Front. Phys. 14(6), 63301 (2019)]'

This supplement contains 222 (angel number) further papers on false or unconfirmed ferroelectric properties in single crystals, ceramics and polymers and only concerns bulk materials. Thus, the number of such papers has reached huge value 727. The papers marked in red have drastically broken the principles of symmetry because they reported the existence of ferroelectricity in crystals without the polar axis.