Linked from
The 21 pages that link to Olfactory receptor, each with the reason it gives.
OlfactionBroader topic: Different receptor proteins detect different features of airborne chemicals.
OdorBroader topic: Different receptor activation patterns help distinguish one odor from another.
Richard AxelBroader topic: Axel and Buck identified the large gene family encoding these receptors.
Linda B. BuckBroader topic: Buck and Axel identified the genes encoding this receptor family.