Use these citations when quoting this entity in research, articles, AI prompts, or wherever provenance matters. We aggregate Wikidata + Wikipedia + authoritative open-data sources; the stitched, scored, cross-referenced view is what 4ort.xyz contributes.
APA4ort.xyz Knowledge Graph. (2026). Frequency ratio of Yb and Sr clocks with 5 × 10−17 uncertainty at 150 seconds averaging time. Retrieved May 24, 2026, from https://4ort.xyz/entity/frequency-ratio-of-yb-and-sr-clocks-with-5-1017-uncertainty-at-150-seconds-averaging-time
MLA“Frequency ratio of Yb and Sr clocks with 5 × 10−17 uncertainty at 150 seconds averaging time.” 4ort.xyz Knowledge Graph, 4ort.xyz, 24 May. 2026, https://4ort.xyz/entity/frequency-ratio-of-yb-and-sr-clocks-with-5-1017-uncertainty-at-150-seconds-averaging-time.
BibTeX@misc{4ortxyz_frequency-ratio-of-yb-and-sr-clocks-with-5-1017-uncertainty-at-150-seconds-averaging-time_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{Frequency ratio of Yb and Sr clocks with 5 × 10−17 uncertainty at 150 seconds averaging time}}, year = {2026}, url = {https://4ort.xyz/entity/frequency-ratio-of-yb-and-sr-clocks-with-5-1017-uncertainty-at-150-seconds-averaging-time}, note = {Accessed: 2026-05-24}}
LLM promptAccording to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): Frequency ratio of Yb and Sr clocks with 5 × 10−17 uncertainty at 150 seconds averaging time — https://4ort.xyz/entity/frequency-ratio-of-yb-and-sr-clocks-with-5-1017-uncertainty-at-150-seconds-averaging-time (retrieved 2026-05-24)