http://www.ece.jhu.edu/~cooper/courses/214/signalsandsystemsnotes.pdf
http://www.ingelec.uns.edu.ar/pds2803/Materiales/LibrosPDF/Papoulis/TOC.HTM
http://books.google.com/books/about/Lectures_on_Fourier_Integrals.html?id=-vU02QewWK8C
http://books.google.com/books/about/Schaum_s_outline_of_theory_and_problems.html?
id=DYBUAAAAMAAJhttp://books.google.com/books?id=JZeO6VTRaIsC&lpg=PP1&pg=PP1#v=onepage&q&f=false
http://books.google.com/books/about/Advanced_Engineering_Mathematics.html?id=TfO_QgAACAAJ
http://www.e-booksdirectory.com/listing.php?category=52
http://www.freebookcentre.net/maths-books-download/Fourier-Analysis-ebook.html
http://www.freebookcentre.net/maths-books-download/Fourier-Series-pdf.html
http://www.freebookcentre.net/maths-books-download/Fourier-Series.html
http://www.freebookcentre.net/maths-books-download/Fourier-Series-notes-presentation.html
http://www.freebookcentre.net/maths-books-download/Fourier-Series-and-Fourier-Transforms.html
http://www.freebookcentre.net/maths-books-download/Microsoft-PowerPoint-Fourier-transform.ppt.html
http://www.freebookcentre.net/maths-books-download/The-Fourier-Transform-and-applications.html
http://www.freebookcentre.net/maths-books-download/The-Fourier-Transform-notes-Slides.html