@inbook{https://resolver.caltech.edu/CaltechAUTHORS:20151222-103336784,
    title = "Mathematical Technology of Networks",
    chapter = "Spectral Inequalities for Quantum Graphs",
    year = "2015",
    url = "https://resolver.caltech.edu/CaltechAUTHORS:20151222-103336784",
    id = "record",
    isbn = "978-3-319-16618-6",
    doi = "10.1007/978-3-319-16619-3\_6"
}