@book{Haggarty_1993, address={Wokingham, England}, edition={2nd ed}, title={Fundamentals of mathematical analysis}, publisher={Addison-Wesley}, author={Haggarty, Rod}, year={1993} }
@book{Ross_López_2013, address={New York}, edition={Second edition}, title={Elementary analysis: the theory of calculus}, volume={Undergraduate texts in mathematics}, publisher={Springer}, author={Ross, Kenneth A. and López, Jorge M.}, year={2013} }