Assessment of structural conditions for an old fortification in Tallinn, EstoniaÕiger, KarlXII International Conference on Durability of Building Materials and Components (XII DBMC), Porto, Portugal, April 12th-15th, 20112011 / p. 649-656 : ill Tõnismäe veetorn sai tehnikaülikoolileEhitaja2013 / lk. 8