Catlin DH, Ahrens BD, Kucherova Y (2002). "Detection of norbolethone, an anabolic steroid never marketed, in athletes' urine". Rapid Communications in Mass Spectrometry. 16 (13): 1273–1275. Bibcode:2002RCMS...16.1273C. doi:10.1002/rcm.722. PMID12112254.
Catlin DH, Ahrens BD, Kucherova Y (2002). "Detection of norbolethone, an anabolic steroid never marketed, in athletes' urine". Rapid Communications in Mass Spectrometry. 16 (13): 1273–1275. Bibcode:2002RCMS...16.1273C. doi:10.1002/rcm.722. PMID12112254.
Catlin DH, Ahrens BD, Kucherova Y (2002). "Detection of norbolethone, an anabolic steroid never marketed, in athletes' urine". Rapid Communications in Mass Spectrometry. 16 (13): 1273–1275. Bibcode:2002RCMS...16.1273C. doi:10.1002/rcm.722. PMID12112254.