1592952525000 1312632483000 term-1653 1616541304987 1312632485000 1616290251439 adlib fitz-online adlib-term-1653 83f14084-2529-3e71-afda-954ff23c9c9d 2 1 stability, structural stability, structural term reference term-1655 adlib-term-1655 9e0c9e10-baee-3886-ae2e-b25f69a6fd7b structural stability