• Behaviour of old timber (roof) structures in TallinnÕiger, KarlProceedings of COST 508 - Wood Mechanics Workshop on Service Life Assessment of Wooden Structures, May 1994, Espoo, Finland1994
• Experiences in design, construction and maintenance of timber shell roofs in EstoniaÕiger, Karl; Kodi, Georg-MihkelSHATIS'11 : International Conference on Structural Health Assessment of Timber Structures, Lisbon, Portugal, 16-17 June 2011 : proceedings2011
• Investigation, design and erection of saddle-shaped wooden shell roofsÕiger, KarlIABSE Conference Lahti 2001 : Innovative Wooden Structures and Bridges : report2001 / p. 397-402 : ill https://structurae.net/en/literature/conference-paper/investigation-design-and-erection-of-saddle-shaped-wooden-shell-roofs