Institute of Mathematics of The Academy of Sciences of the Czech Republic Posted on July 8, 2014 by SCG DR Copyright Holders: Institute of Mathematics of The Academy of Sciences of the Czech Republic Self-archiving policy Conditions Accepted version: √ Published version: √ 12 months embargo Remarks: Mathematica Bohemica is not published by Springer, but copyright holder is Institute of Mathematics of the Academy of Sciences of the Czech republic. (verified by Guang Ying via email) Verification Date: 26.06.2014