N. A. Slavnov, “Generating function for scalar products in the algebraic Bethe ansatz”, Theoret. and Math. Phys., 204:3 (2020), 1216–1226
Charles-Émile Fecteau, Hubert Fortin, Samuel Cloutier, Paul A. Johnson, “Reduced density matrices of Richardson–Gaudin states in the Gaudin algebra basis”, The Journal of Chemical Physics, 153:16 (2020)