%% You should probably cite draft-zern-webp-06 instead of this revision.
@techreport{zern-webp-04,
	number =	{draft-zern-webp-04},
	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-zern-webp-04},
        author =	{James Zern},
	title =		{{WebP Image Format Media Type Registration}},
	pagetotal =	6,
	year =		,
	month =		,
	day =		,
	abstract =	{WebP is a RIFF-based image file format which supports lossless and lossy compression as well as alpha (transparency) and animation. It covers use cases similar to JPEG, PNG and GIF.},
}