Generis Publishing, 2022. 241 pp. ISBN 979-8-88676-403-1 4 November 2004: Tangra. Discovering Antarctica Timeline. Discovery Channel UK, 2012. (англ.)

Black Gives Way to Blue

2009. — ISSN 1045-6295 ALICE IN CHAINS Drummer Interviewed By Bulgaria's TANGRA MEGA ROCK (англ.) // (unknown type) — 2009. ALICE IN CHAINS: 'Lesson Learned'

Found in articles

Лагерь Академия

Tangra Mountains: Livingston Island, Antarctica. Scale 1:25000 map. Sofia: Manfred Wörner Foundation, 2023. ISBN 978-619-90008-6-1 14 November 2004:

Иванов, Любомир

Generis Publishing, 2022. 241 pp. ISBN 979-8-88676-403-1 4 November 2004: Tangra. Discovering Antarctica Timeline. Discovery Channel UK, 2012. (англ.)

Black Gives Way to Blue

2009. — ISSN 1045-6295 ALICE IN CHAINS Drummer Interviewed By Bulgaria's TANGRA MEGA ROCK (англ.) // (unknown type) — 2009. ALICE IN CHAINS: 'Lesson Learned'