diff --git a/math/fibonacci_fast.cpp b/math/fibonacci_fast.cpp
index dc59742b8..08cced351 100644
--- a/math/fibonacci_fast.cpp
+++ b/math/fibonacci_fast.cpp
@@ -11,7 +11,7 @@
  * found if we have already found n/2th or (n+1)/2th fibonacci It is a property
  * of fibonacci similar to matrix exponentiation.
  *
- * @see fibonacci_large.cpp, fibonacci.cpp
+ * @see fibonacci_large.cpp, fibonacci.cpp, string_fibonacci.cpp
  */
 
 #include <cinttypes>
diff --git a/others/happy_number.cpp b/others/happy_number.cpp
index dacb2b8c4..b1debaa54 100644
--- a/others/happy_number.cpp
+++ b/others/happy_number.cpp
@@ -1,7 +1,7 @@
 /**
- * A [happy number](https://en.wikipedia.org/wiki/Happy_number) is a decimal
- * number whose sum of digits is calculated until the sum is a single digit, and
- * this sum turns out to be 1.
+ * @file
+ * @brief A happy number is a number whose sum of digits is calculated until the
+ * sum is a single digit, and this sum turns out to be 1
  */
 
 #include <iostream>