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Völkerling A, Struck HG, Kunert KS, Schmidt-Pokrzywniak A, Fiorentzis M, Viestenz A, Heichel J.Völkerling A, et al. Among authors: heichel j.Klin Monbl Augenheilkd. 2018 Jan;235(1):24-30. doi: 10.1055/s-0043-123073. Epub 2018 Jan 26.Klin Monbl Augenheilkd. 2018.PMID: 29373867German.
Struck HG, Glien A, Herzog M, Sandner A, Plontke SK, Heichel J.Struck HG, et al. Among authors: heichel j.HNO. 2016 Jun;64(6):417-23. doi: 10.1007/s00106-016-0153-7.HNO. 2016.PMID: 27193235German.