@inbook{midpoint_rule,
	author	= "A.C Faul",
	title	= "A Concise Introduction to Numerical Analysis",
	chapter	= "5",
	pages	= "131",
	publisher= "CRC Press",
	year	= "2016",
}

@article{rk4_method,
    author = "Morten Hjorth-Jensen",
    title = "Computational Physics, Lecture Notes Fall 2015",
    journal = "Department of Physics, University of Oslo",
    year = "2015",
    chapter = "8.4",
    pages = "250--252",
}