Sasaki Rokkaku

Hi. I'm trying to find information about the Sasaki clan, that was
based in Southern Omi, until the Oda restored Yoshiaki to Kyoto in
1568. Searching on various search engines including Google has
proven futile, and the little I have gleaned of this clan I have
found in Eiji Yoshikawa's excellent Taiko. Could anyone point me in
the right direction please?

Thanks,
JP