Sources

• APEX Calculus (Hartman et al. 2018)
  

  @Book{hartman+2018,
    author       = {Gregory Hartman and Troy Siemers and Brian Heinold and
                    Dimplekumar Chalishajar},
    title        = {{APEX} Calculus},
    publisher    = {Self-published},
    year         = 2018,
    edition      = {Version 4.0},
    URL          = {http://www.apexcalculus.com}
  }
  

• Book of Proof (Hammack 2018)
  

  @Book{hammack-2018,
    author       = {Richard H. Hammack},
    title        = {Book of Proof},
    publisher    = {Richard Hammack},
    year         = 2018,
    edition      = {3.4},
    note         = {Creative Commons License},
    url          = {https://richardhammack.github.io/BookOfProof/}
  }
  

• Discrete Mathematics: An Open Introduction (Levin 2021)
  

  @Book{levin-2021,
    author       = {Oscar Levin},
    title        = {Discrete Mathematics},
    publisher    = {Self-published},
    year         = 2021,
    edition      = {3th Edition, 5th Printing},
    subtitle     = {An Open Introduction},
    URL          = {http://discrete.openmathbooks.org},
  }
  

• Essential Precalculus (Stitz and Zeager 2013)
  

  @Book{stitz+2013,
    author       = {Carl Stitz and Jeff Zeager},
    editor       = {Sean Fitzpatrick},
    title        = {Essential Precalculus},
    year         = 2013,
    URL          = {https://opentext.uleth.ca}
  }
  

• Fundamentals of Matrix Algebra (Hartman 2011)
  

  @Book{hartman-2011,
    author       = {Gregory Hartman},
    title        = {Fundamentals of Matrix Algebra},
    publisher    = {Self-published},
    year         = 2011,
    edition      = 3,
    note         = {Version 3.1110},
    URL          = {http://www.apexcalculus.com/other-texts},
  }
  

• Introduction to Statistical Thinking (Yakir 2011)
  

  @Book{yakir-2011,
    author       = {Benjamin Yakir},
    title        = {Introduction to Statistical Thinking},
    publisher    = {Self-published},
    year         = 2011,
    month        = jun,
    organization = {The Hebrew University of Jerusalem},
    url          = {http://pluto.huji.ac.il/~msby/StatThink}
  }
  

• Linear Algebra Done Right (Axler 2024)
  

  @Book{axler-2024,
    author       = {Sheldon Axler},
    title        = {Linear Algebra Done Right},
    publisher    = {Springer},
    year         = 2024,
    edition      = 4,
    URL          = {https://linear.axler.net/},
  }