The strong unicity constant and its applications W. Odyniec, M. P. Prophet (2008) Banach Center Publications In this report we discuss the applications of the strong unicity constant and highlight its use in the minimal projection problem.
The strong unicity constant for projections. Lipieta, Agnieska (2006) Zeszyty Naukowe Uniwersytetu Jagiellońskiego. Universitatis Iagellonicae Acta Mathematica