Uniqueness/nonuniqueness for nonnegative solutions of second-order parabolic equations of the form ut=Lu+Vu−γup in RnJános Engländer; Ross G. Pinsky · 2003

On the Construction and Support Properties of Measure-Valued Diffusions on $D subseteq mathbb{R}^d$ with Spatially Dependent BranchingEngländer, János; Pinsky, Ross G. · The Annals of Probability · 1999