move reference MS1977 to global references

Author: dkrenn

src/doc/en/reference/references/index.rst

@@ -5039,6 +5039,11 @@ REFERENCES:
 .. [MS1977] \F. J. MacWilliams, N. J. A. Sloane, *The Theory of Error-Correcting
             Codes*, North-Holland, Amsterdam, 1977
 
+.. [MS1977a] Arnaldo Mandel, Imre Simon,
+             *On Finite Semigroups of Matrices*,
+             Theoretical Computer Science 5 (101-111),
+             North-Holland Publishing Company
+
 .. [MS1994] \P. Martin and H. Saleur.
             *The blob algebra and the periodic Temperley-Lieb algebra*.
             Lett. Math. Phys., **30** (1994), no. 3. pp. 189-206.

src/sage/combinat/regular_sequence_bounded.py

@@ -4,7 +4,7 @@
 This module contains a collection of algorithms to check for boundedness.
 This is done
 - based on eigenvalues and
-- by the criterion presented in [MS1977].
+- by the criterion presented in [MS1977a].
 
 Various
 =======
@@ -16,12 +16,6 @@
     :mod:`sage.rings.cfinite_sequence`,
     :mod:`sage.combinat.binary_recurrence_sequences`.
 
-REFERENCES:
-
-.. [MS1977] Arnaldo Mandel, Imre Simon,
-   *On Finite Semigroups of Matrices*,
-   Theoretical Computer Science 5 (101-111),
-   North-Holland Publishing Company
 
 AUTHORS:
 
@@ -86,7 +80,7 @@ def multiply_reduce(A, B):
 
 def construct_phi(matrices):
     r"""
-    Return the set `\phi(S)` as defined in [MS1977].
+    Return the set `\phi(S)` as defined in [MS1977a].
 
     INPUT:
 
@@ -260,7 +254,7 @@ def is_bounded_via_mandel_simon_algorithm(matrices):
 
     ALGORITHM:
 
-    A criterion based on [MS1977] is used here.
+    A criterion based on [MS1977a] is used here.
 
     EXAMPLES::