Found in articles
3533:2021 - Sex toys — Design and safety requirements for products in direct contact with genitalia, the anus, or both. iso.org. [2021-12-30]. （原始内容存档于2021-12-23）
EmbarrassingProblems.com （页面存档备份，存于互联网档案馆）: Crabs Genetic Analysis of Lice Supports Direct Contact between Modern and Archaic Humans Pthirus pubis. ITIS.
"。map_sendai.html （页面存档备份，存于互联网档案馆）." (Direct image link （页面存档备份，存于互联网档案馆）) Iris Ohyama. Retrieved on November 7, 2010. "Contact 互联网档案馆的存檔，存档日期2010-04-22.." Iris
无损检测
(ART) Angle beam testing Electromagnetic acoustic transducer (EMAT) (non-contact) Laser ultrasonics (LUT) Internal rotary inspection system (IRIS) ultrasonics
5-溴-1-戊烯
R. Ya.; Viktorova, E. A. Synthesis of hydrocarbons. XIX. Synthesis and contact isomerization of 1,7-octadiene. Vestnik Moskovskogo Universiteta, 1951