Paula Maust, Expanding the Music Theory Canon: I, I6, V, V6 and V7, Inversions, and V9
Diverse Music Theory Examples: Tonic and Dominant
Music By Women: Explore the Database. Click on the Chords & Harmonies Filter on the left and select Tonic & Dominant (only)
Yale Musical Examples Database: See the "Harmonic Progressions" tab at the bottom.