Acknowledgements
This research was supported by Grant Agency of the Czech Technical University in Prague, grant No. SGS13/176/OHK2/3T/12 and by grant No. TA01010185 of the Technology Agency from the Czech Republic, and by grant of the Czech Ministry of Education LH12011.
Notes
This article was originally published with errors. This version has been amended. Please see Corrigendum (http://dx.doi.org/10.1080/10255842.2014.993856).