SRT is named after Sweeney [1], Robertson [2], Tocher [3], which came up with the idea independently of each other. There is also a 1956 paper by Nadler said to have a similar algorithm, but it seems impossible to find.

[1] http://www.computerhistory.org/collections/catalog/102632302

[2] https://archive.org/details/newclassofdigita82robe

[3] http://qjmam.oxfordjournals.org/content/11/3/364.full.pdf