diff --git a/Doc/Sd1/inheritance.xml b/Doc/Sd1/inheritance.xml
index afb72dc687b95804943a461bb6acc3b357fed919..3dbb6bf956a2b002465a8cbeb941b0b5b980c2e0 100644
--- a/Doc/Sd1/inheritance.xml
+++ b/Doc/Sd1/inheritance.xml
@@ -1356,7 +1356,7 @@ System.out.println(c.equals(c));   // true: Object equal to itself.</programlist
 
     <figure xml:id="sd1_inherit_fig_rectangleEquals">
       <title>Implementing <classname>Rectangle</classname>.<methodname
-      xlink:href="https://docs.oracle.com/javase/10/docs/api/java/lang/Object.html#equals-java.lang.Object)">equals()</methodname></title>
+      xlink:href="https://docs.oracle.com/javase/10/docs/api/java/lang/Object.html#equals(java.lang.Object)">equals()</methodname></title>
 
       <programlisting language="java">public class Rectangle extends Shape {
     @Override public boolean equals(Object o) {
@@ -1379,7 +1379,7 @@ System.out.println(c.equals(c));   // true: Object equal to itself.</programlist
 
     <figure xml:id="sd1_inherit_fig_circleEquals">
       <title>Implementing <classname>Circle</classname>.<methodname
-      xlink:href="https://docs.oracle.com/javase/10/docs/api/java/lang/Object.html#equals-java.lang.Object)">equals()</methodname></title>
+      xlink:href="https://docs.oracle.com/javase/10/docs/api/java/lang/Object.html#equals(java.lang.Object)">equals()</methodname></title>
 
       <programlisting language="java">public class Circle extends Shape {
   @Override public boolean equals(final Object o) {
diff --git a/Doc/Sd1/workingWithNumbers.xml b/Doc/Sd1/workingWithNumbers.xml
index 2f04d2df9dc91f7bd419f0002d89562e99bccf80..b98aa65848772a29f7830fc297740220f3e7991d 100644
--- a/Doc/Sd1/workingWithNumbers.xml
+++ b/Doc/Sd1/workingWithNumbers.xml
@@ -54,7 +54,7 @@ while (!values.empty()) {
           <itemizedlist>
             <listitem>
               <para><methodname
-              xlink:href="https://docs.oracle.com/javase/10/docs/api/java/lang/Object.html#equals-java.lang.Object)">public
+              xlink:href="https://docs.oracle.com/javase/10/docs/api/java/lang/Object.html#equals(java.lang.Object)">public
               boolean equals</methodname>(<classname
               xlink:href="https://docs.oracle.com/javase/10/docs/api/java/lang/Object.html">Object</classname>
               obj)</para>