Cytomer: A database on gene expression sources. - Ellen Fricke; Sigrid Land; Stella Rotert; Dagmar Karas; Edgar Wingender (German Conference on Bioinformatics, 2001)

TRANSFAC®: transcriptional regulation, from patterns to profiles. - V. Matys; Ellen Fricke; R. Geffers; Ellen Gößling; Martin Haubrock; Reinhard Hehl; Klaus Hornischer; Dagmar Karas; Alexander E. Kel; Olga V. Kel-Margoulis; Dorothee-U. Kloos; Sigrid Land; et al. (Nucleic Acids Res., 2003)

TRANSFAC® and its module TRANSCompel®: transcriptional gene regulation in eukaryotes. - V. Matys; Olga V. Kel-Margoulis; Ellen Fricke; Ines Liebich; Sigrid Land; A. Barre-Dirrie; Ingmar Reuter; D. Chekmenev; Mathias Krull; Klaus Hornischer; Nico Voss; Philip Stegmaier; et al. (Nucleic Acids Res., 2006)