info:oai:pure.iiasa.ac.at:14127info:ofi/fmt:xml:xsd:bookDemidovaV. A.Demidova, V. A.DemyanovV.F.Demyanov, V.F.19860303-3929978-3-642-00929-7A directional implicit function theorem for quasidifferentiable functionsQuasidifferential Calculusbookitem