On the values of continued fractions: q-series. - Tapani Matala-aho (J. Approx. Theory, 2003)

New irrationality measures for q-logarithms. - Tapani Matala-aho; Keijo O. Väänänen; Wadim Zudilin (Math. Comput., 2006)

Euler's Divergent Series in Arithmetic Progressions. - Anne-Maria Ernvall-Hytönen; Tapani Matala-aho; Louna Seppälä (J. Integer Seq., 2019)