@Book{Bopp1976,
author  = "Bopp, Fritz",
title   = "Eine Spinorfeldtheorie im expliziten relativistisch-invarianten Schrödingerbild",
year    = "1976",
address = "München",
series  = "Sitzungsberichte",
volume  = "1975,6",
url     = "https://publikationen.badw.de/en/012320192",
}