- The full version of the paper: 30 October 2021.

 

Refereed proceedings will be published in General Mathematics https://generalmathematics.ro/ . Deadline of the fulltext paper submission is 30 October 2021. The full version of the accepted papers must be typeset in LaTeX (General Mathematics format which is at the address: https://generalmathematics.ro/submit-article/ and sent by e-mail (augusta.ratiu@ulbsibiu.ro).