National Hurricane Center: April 22 Ship Data. (GIF) 1992, abgerufen am 7. November 2007 (englisch).
National Hurricane Center: Subtropical Storm One Preliminary Report. (GIF) 1992, abgerufen am 7. November 2007 (englisch): „subtropical cyclones have only been tracked since 1968 (tropical cyclone records go back to 1871) and it is possible some systems that were designated extratropical prior to 1968 could have been subtropical.“