Kato MV, Ikawa Y, Hayashizaki Y, Shibata H. Paternal imprinting of mouse serotonin receptor 2A gene Htr2 in embryonic eye: a conserved imprinting regulation on the RB/Rb locus. Genomics. 1998 Jan 01;47(1):146–8. doi: 10.1006/geno.1997.5089. PMID: 9465310.