Before revision:  Furthermore, as also shown by [ DSels ], one of the simplest optimization algorithms available, Stochastic Ascent, can outperform all of the above.
After revision:  Furthermore, as also shown by [ D. Sels, Phys. Rev. A 97, 040302 ], one of the simplest optimization algorithms available, Stochastic Ascent, can outperform all of the above.