Shake to start if it doesn’t auto-start.
I accidentally made a triangle wave oscillator with a very similar circuit, so I decided to swap out the BJTs with MOSFETs and remove the power supply resistor to see what happens. As a result, I accidentally made a sine-wave oscillator with a THD (total harmonic distortion) of only 2.35%*! Of course, results may vary IRL, but in the sim this makes for a great sine-wave oscillator with a remarkably pure output considering the lack of filtering.
*Originally measured 0.74% but forgot to take into account the attenuation of the measured distortion from the measuring setup so I re-measured and adjusted for the attenuation which gave me 2.35%.