Dear colleagues, we would like to remind you about Workshop on Precision Physics and Fundamental Physical Constants (FFK 2013), which will be held in St. Petersburg from October 7 until October 11, 2013 in Pulkovo observatory ( http://www.gao.spb.ru ). We thank those who has already registered ( http://www.gao.spb.ru/russian/psas/ffk2013/part-en.html ), and invite those who has not to do it before August 31. Please, send your abstracts before July 31. ... The main topics of the workshop are: . ...