1)                  http://www.nbuv.gov.ua -  Vernadsky National Library of Ukraine

2)                  http://www.scopus.com – Bibliometric and Review Scopus Database

3)                  http://www.library.gov.ua – National Scientific Medical Library of Ukraine

4)                  http://www.udenta.org.ua – Ukrainian Dental Association 

5)                  http://www.fdiworldental.org – World Dental Federation

6)                  http://www.ada.org – American Dental Association

7)                  http://www.amnu.gov.ua – National Academy of Medical Sciences of Ukraine

8)                   http://adee.dental.tcd.ie – Association for Dental Education in Europe

9)                  http://www.usperio.org.ua – Association of Periodontists of Ukraine

10)              http://www.efp.org – European Association of Periodontology 

11)              http://www.rsp.com.ru – Russian Society of Periodontology

12)              http://www.joponline.org – Journal of Periodontology