@book{5072,
	author = {Kroupa, Venceslav F.},
	title = {Frequency Stability :},
	publisher = { John Wiley & Sons,},
	year = {c 2012.},
	address = {Hoboken, New Jersey :},
	url = {https://onlinelibrary.wiley.com/doi/pdfdirect/10.1002/9781118310144?download=true}
}