**Author details**

Tony Boiadjiev1 , George Boiadjiev2 \*, Kamen Delchev2,3, Ivan Chavdarov2 and Roumen Kastelov4

1 Institute of Information and Communication Technologies, Bulgarian Academy of Sciences, Sofia, Bulgaria

2 Faculty of Mathematics and Informatics, Sofia University, Sofia, Bulgaria

3 Institute of Mechanics, Bulgarian Academy of Sciences, Sofia, Bulgaria

4 Orthopedic and Trauma Clinical Centre, Ministry of Interior, Sofia, Bulgaria

\*Address all correspondence to: george@fmi.uni-sofia.bg

© 2021 The Author(s). Licensee IntechOpen. This chapter is distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/ by/3.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
