Pleven, Bulgaria
Plovdiv, Bulgaria
No contact information provided
Poznan, Poland
Katowice, Poland
Sofia, Bulgaria
Varna, Bulgaria
Wien, Austria
Wroclaw, Poland
London, United Kingdom
Ulaanbaatar, Mongolia
Bucharest, Romania
Prishtina, Kosovo
Cuernavaca, Mexico
Warsaw, Poland
Taipei, Taiwan
Kyiv, Ukraine
Astana, Kazakhstan
Utrecht, Netherlands
Chisinau, Moldova
Bochum, Germany
Olomouc, Czechia
Salzburg, Austria
Chandigarh, India
