I would like to point to excellent articles written by my friend Ivan Lavrinenko about Luftwaffe aces in Crimea. The level of Ivan's research is amazing. Although the articles are in Russian, I hope that with google translate most of you will be able to understand the essence
http://warspot.ru/7553-sheynaya-chesotka-professionalnaya-bolezn-asov-lyuftvaffe
http://warspot.ru/7199-luchshiy-den-gauptmana-barkhorna
http://proza.ru/2016/07/07/1127
http://proza.ru/2016/07/12/591
Cheers,
Boris