Stability of flow and the transition to turbulence around a quartz tuning fork in superfluid<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mmultiscripts><mml:mi mathvariant="normal">He</mml:mi><mml:mprescripts /><mml:none /><mml:mn>4</mml:mn></mml:mmultiscripts></mml:math>at very low temperatures
Physical review. B, Condensed matter and materials physics