Since new publishing models and new communication channels are being developed, recent information and communication technologies change the ways of scholarly communication. Traditional ways of measuring journal and article impact are not sufficient – besides bibliometrics (based on citation analysis), altmetrics arises as a new method based on quantitative analysis of mentions on blogs, in the news, shares on social networking sites, captures etc. The field of altmetrics is still new and further research still has to be done to find out if altmetric indicators are reliable quantitative measure of scholarly literature quality.