A selection of the literature I consulted about strings and scaling:

• A. Askenfelt and E. Jansson, from touch to string vibrations, III: String motion and spectra, Journal Acoustical Soc. America, 93, 1993
  
  
• H. A. Conklin, United States Patent 3,523,480, 1970
  
  
• H. A. Conklin, Design and tone in the mechanoacoustic piano, Part III, Piano strings and scale design, Journal Acoustical Soc. America, 100, 1996
  
  
• H. A. Conklin, Piano strings and "phantom" partials, Journal Acoustical Soc. America, 102, 1997
  
  
• H. A. Conklin, generation of partials due to nonlinear mixing in a stringed instrument, Journal Acoustical Soc. America, 105, 1999
  
  
• K. Fenner, Berechnung der Spannung umsponnener Saiten, Verlag Das Musikinstrument, Frankfurt
  
  
• K. Fenner, J. Grossbach, Praktisches Handbuch der Klavierkonstruktion, 2000, Bochinsky, Frankfurt
  
  
• H. Fletcher, Normal Vibration Frequencies of a stiff Piano String, Journal Acoustical Soc. America, 36, 1964
  
  
• N. H. Fletcher and T. D. Rossing, The Physics of Musical Instruments, 1998, Springer, New York
  
  
• W. T. Goddard, A Handbook on the Strings of the pianoforte and other keyboardinstruments with design formulae, 1985, Hartburn, England
  
  
• C. Karp, The Inharmonicity of Strung Keyboard Instruments, Acustica, 60, 1986 
  
  
• U. Laible, Fachkunde Klavierbau, 2000, Bochinsky, Frankfurt
  
  
• P. M. Morse, Vibration and Sound, 1948
  
  
• H. Suzuki and I. Nakamura, Acoustics of Pianos, Applied Acoustics, 30, 1990 
  
  
• P. Tholey, Praxisorientierte Mensuration mit dem Computer, 1992, Bochinsky, Frankfurt
  
  
• G. Weinreich, Coupled piano strings, Journal Acoustical Soc. America, 62, 1977
  
  
• R.W. Young, Inharmonicity of Plain Wire Piano Strings, Journal Acoustical Soc. America, 24, 1952