@book{taylor,
    author = "Taylor, Joseph L.",
    title = "Complex Variables",
    publisher = {AMS},
    year = {2011},
    isbn = {978-0-8218-6901-7},
    keywords = {complex,variables,analysis}
}

@unpublished{sekhon,
    author = "Sekhon, Senan",
    title = "Metric and Topological Spaces",
    year = {2019},
    note = "Unpublished",
    keywords = {metric spaces,topological spaces}
}