tˈuː θˈaʊzənd θɹˈiː "vˈoːɹstɑːs ɪn dˈaɪ ʌntˈɜːwɛlt ɐbˈɛntjuːɚ hˈɜːhlənfˌoːɹʃʌŋ" ɐpɹˈoʊtʃ tə ðɪ ˈʌndɚwˌɜːld ɐdvˈɛntʃɚ kˈeɪv ɹᵻsˈɜːtʃ wʌz pˈʌblɪʃt.
2003 "Vorstoß in die Unterwelt – Abenteuer Höhlenforschung" (Approach to the Underworld – Adventure Cave Research) was published.