The concept was developed by Paracelsus and published in his writings.

The concept was first published at two international academic conferences in 2009 (see below).

The concept was first published, however, by William Wallace in 1797.

His pioneering concept on feedback was published in 1935.

The tool's underlying concept and data were published in various scientific publications.

Published concepts for secure key transmission are published in several context.

However, this concept only appeared on Sereno's Web site and has not yet been officially published as a valid name.

The basic concepts of the endurance time method were published in 2004.

The concept was published in a 2012 calendar, which was distributed to journalists.

After further work on the design, a final concept was published in November 1944.