diff --git a/README.md b/README.md
index 956bee5..ff01a2d 100644
--- a/README.md
+++ b/README.md
@@ -280,10 +280,11 @@
 `autoOperatorNames`, a list of the same form (space-delimited letters-only each
 length>=2), and overrides the set of operator names that automatically become
 non-italicized when typing the letters without typing a backslash first, like
-`sin`, `log`, etc. (Defaults to [the LaTeX built-in operator names][Wikia], but
-with additional trig operators like `sech`, `arcsec`, `arsinh`, etc.)
+`sin`, `log`, etc. Defaults to the LaTeX built-in operator names ([Section
+3.17 of the Short Math Guide][3.17]) plus some missing trig operators like
+`sech`, `arcsec`, `arsinh`, etc.
 
-[Wikia]: http://latex.wikia.com/wiki/List_of_LaTeX_symbols#Named_operators:_sin.2C_cos.2C_etc.
+[3.17]: http://tinyurl.com/jm9okjc
 
 `substituteTextarea`, a function that creates a focusable DOM element, called
 when setting up a math field. It defaults to `<textarea autocorrect=off .../>`,
diff --git a/src/commands/math/basicSymbols.js b/src/commands/math/basicSymbols.js
index e295e46..979ae9d 100644
--- a/src/commands/math/basicSymbols.js
+++ b/src/commands/math/basicSymbols.js
@@ -144,7 +144,7 @@
   }
 });
 var BuiltInOpNames = {}; // the set of operator names like \sin, \cos, etc that
-  // are built-into LaTeX: http://latex.wikia.com/wiki/List_of_LaTeX_symbols#Named_operators:_sin.2C_cos.2C_etc.
+  // are built-into LaTeX, see Section 3.17 of the Short Math Guide: http://tinyurl.com/jm9okjc
   // MathQuill auto-unitalicizes some operator names not in that set, like 'hcf'
   // and 'arsinh', which must be exported as \operatorname{hcf} and
   // \operatorname{arsinh}. Note: over/under line/arrow \lim variants like