Pregliasco, Mauro; Pregliasco, Valeria, red. (29. oktober 2016). «Good to Know». 425 DX News. Arkivert fra originalen 9. november 2016. Besøkt 22. april 2018. «+ SILENT KEY + Dr. Lutz D. Schmadel, DK8UH passed away on 21 October. Born in 1942, he was an astronomer whose special interest was the astrometry of minor planets.»«Arkivert kopi». Arkivert fra originalen 9. november 2016. Besøkt 21. april 2018.
cocolog-nifty.com
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Trifu, Cezar (24. oktober 2016). «GDXF Secretary のDK8UH Lutzさん訃報». IOTA-chasers mailing list(English/Japanese). «news of Lutz's (DK8UH) passing last Friday. … a very passionate radio amateur, who fell hard in love with the IOTA Programme. As a Board member of the German DX Foundation …»
Pregliasco, Mauro; Pregliasco, Valeria, red. (29. oktober 2016). «Good to Know». 425 DX News. Arkivert fra originalen 9. november 2016. Besøkt 22. april 2018. «+ SILENT KEY + Dr. Lutz D. Schmadel, DK8UH passed away on 21 October. Born in 1942, he was an astronomer whose special interest was the astrometry of minor planets.»«Arkivert kopi». Arkivert fra originalen 9. november 2016. Besøkt 21. april 2018.