The transition from the 20th to the 21st century was one of the most dynamic periods in the history of science and scientific journals. Numerous articles are almost entirely prepared in electronic form, so the creation of many databases with full texts become relatively easy problem to solve. A large number of the journals appeared in form of open access in electronic form available for end users - readers. But often the question raises about the value of these scientific journals with journals that are still available and already present on a commercial basis. In particular, this applies to journals within medicine, where reliability and quality, or the credibility of the information itself is of great importance for science itself.