diff --git a/skimage/transform/radon_transform.py b/skimage/transform/radon_transform.py
index 1ca56feb..b69439a2 100644
--- a/skimage/transform/radon_transform.py
+++ b/skimage/transform/radon_transform.py
@@ -337,11 +337,14 @@ def iradon_sart(radon_image, theta=None, image=None, projection_shifts=None,
     information, but will also often increase the noise.
 
     References:
-        -A. C. Kak, Malcolm Slaney, "Principles of Computerized Tomographic
+        -AC Kak, M Slaney, "Principles of Computerized Tomographic
         Imaging", IEEE Press 1988.
         -AH Andersen, AC Kak, "Simultaneous algebraic reconstruction technique
         (SART): a superior implementation of the ART algorithm", Ultrasonic
         Imaging 6 pp 81--94 (1984)
+        -S Kaczmarz, "Angenäherte auflösung von systemen linearer
+        gleichungen", Bulletin International de l’Academie Polonaise des
+        Sciences et des Lettres 35 pp 355--357 (1937)
         -Kaczmarz' method, Wikipedia,
         http://en.wikipedia.org/wiki/Kaczmarz_method
     """