Hummel T, Rissom K, Reden J, Hähner A, Weidenbecher M, Hüttenbrink KB (March 2009). "Effects of olfactory training in patients with olfactory loss". The Laryngoscope. 119 (3): 496–9. doi:10.1002/lary.20101. PMID19235739. S2CID5239574.
Hummel T, Rissom K, Reden J, Hähner A, Weidenbecher M, Hüttenbrink KB (March 2009). "Effects of olfactory training in patients with olfactory loss". The Laryngoscope. 119 (3): 496–9. doi:10.1002/lary.20101. PMID19235739. S2CID5239574.
Hummel T, Rissom K, Reden J, Hähner A, Weidenbecher M, Hüttenbrink KB (March 2009). "Effects of olfactory training in patients with olfactory loss". The Laryngoscope. 119 (3): 496–9. doi:10.1002/lary.20101. PMID19235739. S2CID5239574.