%% You should probably cite draft-ietf-httpbis-variants instead of this I-D.
@techreport{nottingham-variants-01,
	number =	{draft-nottingham-variants-01},
	type =		{Internet-Draft},
	institution =	{Internet Engineering Task Force},
	publisher =	{Internet Engineering Task Force},
	note =		{Work in Progress},
	url =		{https://datatracker.ietf.org/doc/html/draft-nottingham-variants-01},
        author =	{Mark Nottingham},
	title =		{{HTTP Representation Variants}},
	pagetotal =	15,
	year =		,
	month =		,
	day =		,
	abstract =	{This specification introduces the HTTP "Variants" response header field to communicate what representations are available for a given resource, and the companion "Variant-Key" response header field to indicate which representation was selected. It is an augmentation of the "Vary" mechanism in HTTP caching.},
}