Prodi DA, Drayna D, Forabosco P, Palmas MA, Maestrale GB, Piras D, Pirastu M, Angius A (2004). „Bitter Taste Study in a Sardinian Genetic Isolate Supports the Association of Phenylthiocarbamide Sensitivity to the TAS2R38 Bitter Receptor Gene”. Chemical Senses. 29 (8): 697—702. PMID15466815. doi:10.1093/chemse/bjh074.
Kim UK, Drayna D (2004). „Genetics of individual differences in bitter taste perception: Lessons from the PTC gene”. Clinical Genetics. 67 (4): 275—280. PMID15733260. doi:10.1111/j.1399-0004.2004.00361.x.
Prodi DA, Drayna D, Forabosco P, Palmas MA, Maestrale GB, Piras D, Pirastu M, Angius A (2004). „Bitter Taste Study in a Sardinian Genetic Isolate Supports the Association of Phenylthiocarbamide Sensitivity to the TAS2R38 Bitter Receptor Gene”. Chemical Senses. 29 (8): 697—702. PMID15466815. doi:10.1093/chemse/bjh074.
Kim UK, Drayna D (2004). „Genetics of individual differences in bitter taste perception: Lessons from the PTC gene”. Clinical Genetics. 67 (4): 275—280. PMID15733260. doi:10.1111/j.1399-0004.2004.00361.x.