A list of 10 to 15 words and phrases that reflect the main content of the article and determine the subject area of research is provided. Keywords allow you to facilitate and expand the opportunities of finding articles by means of information search engines.

The list of keywords should preferably be based on Scopus statistics on relevant topics. Except for the proper names given in a definite context, keywords are capitalized; separated by commas; and no full stop is placed at the end of the list.