Bruckner-Gesamtausgabe (Bruckner complete edition, Vienna). Today he is a well-known Bruckner-scholar, in particular due to his studies and editions on Bruckner's Ninth Symphony. He was also a member of the editorial team of Nicola Samale which prepared the Completed Performing Version of the unfinished Finale of Bruckner's Ninth (1986–2012). He resigned from the team in 2021 after John A. Phillips had published his own revision without Cohrs' participation. For the Magazine Musik-Konzepte he compiled Vol. 120/121/122 on request of the earlier editors, Heinz-Klaus Metzger and Rainer Riehn (Bruckners Neunte im Fegefeuer der Rezeption, Munich 2003). He also edited new completed performing versions of Schubert’s Unfinished Symphony in b-minor, the Great Mass in C minor and the Requiem by Mozart, both based on original sources. Since 2012 he is Editor in Chief of the Anton Bruckner Edition Wien (Alexander Hermann publishing group, Vienna; distributed by Schott Music), in which all collected works by Anton Bruckner will appear in new, modern Urtext editions. As the first volume of the Anton Bruckner Urtext Gesamtausgabe (Patron: Nikolaus Harnoncourt - until to his death -; since 2019: Simon Rattle), the Symphony No. 7 in E major appeared in Summer 2015 (First Performance: 2 May 2015, Milano/La Scala; 3 May 2015, Vienna/Musikverein; Berliner Philharmoniker, Simon Rattle). In 2016 the Symphony No. 6 in A major followed (First Performance: April 2016 in Paris, London, Bruxelles, Orchestra of the Age of Enlightenment, Simon Rattle), 2017 the Missa Solemnis in B flat (First Performance: 25 June 2017, Berlin/Konzerthaus, RIAS-Kammerchor, Akademie für Alte Musik Berlin, Lukasz Borowicz), 2018 the Symphony No. 5 in B-flat major (First Performance: Swedish Radio Symphony Orchestra, Daniel Harding, Stockholm/Berwaldhallen, 4 September 2018), 2018 the Requiem d minor (First Performance: 22 November 2018, Berlin/Philharmonie, RIAS-Kammerchor, Akademie für Alte Musik Berlin, Lukasz Borowicz), and 2021 the Symphony No. 4 in E-flat major (Version 1878–81, including - as appendices - the earlier Scherzo and Finale discarded in 1878; First Performance: 19 to 27 September 2021 in London, Luxembourg, Frankfurt, Dortmund and Cologne, London Symphony Orchestra, Simon Rattle). Editions of music Lili Boulanger: Théme et Variations for Piano(1915). First Edition. Tonger, Cologne, 2005 (ISMN-M-005-32611-3) Anton Bruckner: Symphony No. IX in d-minor (score and parts) New critical edition, Bruckner Complete Edition, Vienna 2000 (ISMN-M-50025-225-2) Anton Bruckner: Symphony No. IX, Finale (unfinished). Completed Performance Version (1986–92/rev. 1996); (with Nicola Samale, John A. Phillips, Giuseppe Mazzuca); Adelaide/Bremen 1992. Revised Edition (with Nicola