1 files changed, 6 insertions, 0 deletions
diff --git a/references.bib b/references.bib
index d331cb9..9c4369e 100644
--- a/references.bib
+++ b/references.bib
@@ -107,3 +107,9 @@ doi = {10.1007/s40313-021-00740-x}
 	author = {Miller, TJE and Hendershot, J.R},
 	publisher = {Magna Physics and Clarendon Press, Oxford},
 }
+@book{scarpino2015motors,
+  title={Motors for makers: a guide to steppers, servos, and other electrical machines},
+  author={Scarpino, Matthew},
+  year={2015},
+  publisher={Que Publishing}
+}