@article{oai:tobunken.repo.nii.ac.jp:00003865,
 author = {佐々木, 淑美 and 吉田, 直人 and 小椋, 大輔 and 石崎, 武志 and 日高, 健一郎 and Juni, SASAKI and Naoto, YOSHIDA and Daisuke, OGURA and \nTakeshi, ISHIZAKI and Kenichiro, HIDAKA},
 issue = {52},
 journal = {保存科学, Science for conservation},
 month = {Mar},
 note = {Hagia Sophia has many conservation problems, especially at the west part of the building. The inner wall has been suffering from salt flaking of mortar and crystallization, and the outer wall has also been weakened. Removal of plaster from the outer wall surface
and rainwater penetration from the exposed wall are thought to be the causes of deterioration at the inner/outer wall.
 As a result of survey and analysis of the outer wall, it was found that shaving was caused by the following factors.
1) Strong north-east sea wind has been shaving the joint mortar.
2) Rainwater flow has been providing the wet condition and removing the joint mortar and restored mortar.
3) Solar insolation is thought to be also affecting the wall surface.
 Analysis of the crystallized salts on the inner wall revealed that they were sodium sulfate, magnesium sulfate and sodium nitrate. At the northwest part of the building (northwest exedra), the major type of salt was sodium sulfate; magnesium sulfate was found at the edge of the windows. The corresponding outer wall of these parts are degraded and have holes at the junction with the wall and the roof. Sodium nitrate was found at the lower part of the inner wall.},
 pages = {167--180},
 title = {〔報告〕ハギア・ソフィア大聖堂外壁の劣化とその要因に関する調査},
 year = {2013}
}