{
    "query": {
        "category": "Mathematics",
        "publication_date": "1999-04",
        "nr_of_items": 2
    },
    "items": [
        {
            "title": "Arithmetic of Quadratic Forms",
            "subtitle": null,
            "author": "Yoshiyuki Kitaoka",
            "isbn": "9780521649964",
            "publisher": "Cambridge University Press",
            "link_to_publisher": "https:\/\/www.cambridge.org\/universitypress\/subjects\/mathematics\/number-theory\/arithmetic-quadratic-forms?format=PB"
        },
        {
            "title": "Classical Invariant Theory",
            "subtitle": null,
            "author": "Peter J. Olver",
            "isbn": "9780521558211",
            "publisher": "Cambridge University Press",
            "link_to_publisher": "https:\/\/www.cambridge.org\/universitypress\/subjects\/mathematics\/algebra\/classical-invariant-theory?format=PB"
        }
    ]
}