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Science 24 October 1997:
Vol. 278. no. 5338, p. 549
DOI: 10.1126/science.278.5338.549b
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This Week in Science

Superfluid helium-4 is hard to contain since it wets nearly all surfaces and flows freely without dissipation. Ross et al. (p. 664) show that on uniform cesium surfaces, however, superfluid helium-4 will form isolated droplets. The contact angle with the surface shows hysteresis depending on flow direction, and the droplets pin to the surface, refusing to flow down an incline.

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Science. ISSN 0036-8075 (print), 1095-9203 (online)