On the origin and evolutionary state of RZ Cassiopeiae, KO Aquilae, and S EquuleiN. Mennekens, J.-P. De Greve, W. Van Rensbergen and L. R. YungelsonA&A, 486 3 (2008) 919-921DOI: https://doi.org/10.1051/0004-6361:200809530