@misc{GrotrianNSU,
author = "{V.V. Kazakov and V.G. Kazakov and A.S. Yatsenko and O.I. Meshkov and others}",
note = "{Novosibirsk State University}. http://grotrian.nsu.ru. Accessed August 19, 2017",
title = {{Information system "Electronic Structure of Atoms"}},
url = "http://grotrian.nsu.ru"
}