Gallego Lupiáñez, Francisco2023-06-202023-06-2019951130-4723https://hdl.handle.net/20.500.14352/57494engA survey on sigma-productsjournal articlehttp://dialnet.unirioja.es/servlet/revista?codigo=8147open access515.1Sigma-productsCorson compactWeak B-propertyShrinking propertyTopología1210 Topología