Guitar

•  Knut Welsch (he's the one, who built my instruments) 
•  Wolfgang Lendle (Germany) 
•  Klaus Jäckle (Germany) 
•  Wilgard Hübschmann (Germany) 
•  Maximilian Mangold (Germany) 
•  Natalia Merkel (Germany/Ukraine) 
•  Michael Tröster (Germany) 
•  David Russell (Great Britain) 
•  Stefan Grasse (Germany) 
•  Peter Ernst (Germany) 
•  Pepe Romero 
•  John Williams 
•  Sunday-Afternoon-Project (Guitarduo with Hermann Schäfer and Matthias Seuling) 
•  Eythor Thorlaksson (lots of sheet music) 
•  Ernestos Gitarrenlehrerseite 
•  Jürg Hochweber (some compositions) 
•  Kultur und Gitarre(Forum for guitar) 
•  Gitarrissimo (Informationen about the classical guitar) 
•  Die Hamburger Gitarrenseite 
•  Chanterelle Verlag 
•  Haus der Musik Trekel 
•  Micro Mesh zur Fingernagelpflege 
•  Saitenkatalog.de 
•  Worldguitarist.com 

more musicians and artists

•  Johannes Heiner – poetry 
•  Hanna Eittinger - soprano 
•  Uwe H. Schmidt - Fotografische Kunst und Videokunst 
•  Wolfgang Wurm - poet 

Organisations

•  Saitenwirbel e.V. (Association for the encouragement of the guitar and related instruments) 
•  Fabel24 Specialist counselling for reading by Andrea Rauch 
•  GEMA (Society for musical performing and mechanical reproduction rights) 
•  European Guitar Teachers Association - Germany 
•  German Music Informationcentre 

Composer

•  Anton Diabelli 
•  Edvard Grieg Museum - Troldhaugen 
•  Joaquin Rodrigo 
•  Sir Malcolm Arnold 
•  Rolf Riehm 
•  Agostin Barrios Mangoré 
•  Nicky Hind