On some Fricke families and application to the Lang-Schertz conjecture
  We first investigate two kinds of Fricke families consisting of Fricke functions and Siegel functions, respectively. And, in terms of their special values we generate ray class fields of imaginary quadratic fields, which is related to the Lang-Schertz conjecture. 
Ho Yun Jung, Ja Kyung Koo and Dong Hwa Shin
math.NT