Information about the Republic of Slovenia:

https://www.slovenia.info/en

https://www.ricksteves.com/europe/slovenia

https://www.cia.gov/library/publications/the-world-factbook/geos/si.html

Information about the Republic of Croatia:

http://www.croatia.hr/ 

https://www.ricksteves.com/europe/croatia

https://www.cia.gov/library/publications/the-world-factbook/geos/hr.html

Information about the Republic of Bosnia & Herzegovina:

http://www.bhtourism.ba/eng/

https://www.ricksteves.com/europe/bosnia-herzegovina

https://www.cia.gov/library/publications/the-world-factbook/geos/bk.html