Some change at google or the SD society site has broken the old approach for filtering searches to SD conference papers, which was
site:www.systemdynamics.org/conferences/* bathtub dynamics
Now it appears that
site:www.systemdynamics.org bathtub dynamics
still works, though with a bit of noise from general SD society pages.
For some reason, the old way still works in a google custom search:
Update: the new preferred syntax appears to be:
site:systemdynamics.org inurl:conferences bathtub dynamics

“site:systemdynamics.org inurl:conferences bathtub dynamics” works. I suppose that you can only have the domain after site. Greetings from Germany, lars
I didn’t know about the inurl: keyword – good trick. Thanks!