Added citation for FFTW

Until now we weren't including the citation for FFTW (one of the template's
optional packages). With this commit, it is added.

1 files changed, 19 insertions, 0 deletions

diff --git a/tex/dependencies/fftw.tex b/tex/dependencies/fftw.tex
new file mode 100644
index 0000000..60c24a8
--- /dev/null
+++ b/tex/dependencies/fftw.tex
@@ -0,0 +1,19 @@
+%% Copyright (C) 2019 Mohammad Akhlaghi <mohammad@akhlaghi.org>
+%%
+%% Copying and distribution of this file, with or without modification,
+%% are permitted in any medium without royalty provided the copyright
+%% notice and this notice are preserved.  This file is offered as-is,
+%% without any warranty.
+
+@ARTICLE{fftw,
+   author = {M. {Frigo} and S. G. {Johnson}},
+  journal = {IEEE Proc.},
+    title = {The Design and Implementation of FFTW3},
+     year = {2005},
+   volume = {93},
+   number = {2},
+    pages = {216},
+      doi = {10.1109/JPROC.2004.840301},
+     ISSN = {0018-9219},
+    month = {Feb},
+}