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	<REFERENCE_TYPE>31</REFERENCE_TYPE>
	<AUTHORS>
		<AUTHOR>Shaaban Khalil</AUTHOR>
		<AUTHOR>Osamu Seto</AUTHOR>
	</AUTHORS>
	<YEAR>9999</YEAR>
	<TITLE>Sterile neutrino dark matter in $B-L$ extension of the standard model and galactic $511$ keV line</TITLE>
</RECORD>
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