Industrial Zone,

8800 Sliven, Bulgaria

tel.: +359 44 62 56 66

fax.: +359 44 62 56 66

email: vela_sliven@yahoo.com

12-B, Prof. Hr. Vakarelski, Vitosha,

1000 Sofia, Bulgaria

tel.: +359 2 868 83 09

tel./fax.: +359 2 962 61 43

email: vela_sliven@abv.bg