Admissible tracks in Shamir's scheme. - Andrzej Schinzel; Stanislaw Spiez; Jerzy Urbanowicz (Finite Fields Their Appl., 2010)

Non-admissible tracks in Shamirʼs scheme. - Stanislaw Spiez; Andrey Timofeev; Jerzy Urbanowicz (Finite Fields Their Appl., 2011)

Remarks on the Classical Threshold Secret Sharing Schemes. - Stanislaw Spiez; Marian Srebrny; Jerzy Urbanowicz (Fundam. Informaticae, 2012)

On constructing privileged coalitions in Shamir's type scheme. - Stanislaw Spiez; Jerzy Urbanowicz; Aleksander Zablocki (Finite Fields Their Appl., 2013)