Watt, Fabian A., et al. “Coupling of CO
2 and Epoxides Catalysed by Novel
N-Fused Mesoionic Carbene Complexes of Nickel(<scp>ii</Scp>).”
Dalton Transactions, vol. 50, no. 46, Royal Society of Chemistry (RSC), 2021, pp. 17361–71, doi:
10.1039/d1dt03311e.