The revised SI: fundamental constants, basic physics and units - Blaum, Klaus; Budker, Dmitry; Surzhykov, Andrey; Ullrich, Joachim (Annalen der Physik, 2019)
"The basic aspects of the physics of fundamental constants as well as their impact for the metrology and the revised SI were in the focus of the 670th WE‐Heraeus seminar. This meeting took place from May 13th to 18th 2018 in Bad Honnef ... Many of the ideas and results, discussed and even born during the seminar, are reported in this Special Issue. In particular, the present issue includes invited reviews by world‐leading experts who consider the use of fundamental constants for the definition and realization of the base units of the new SI." - Editorial