diff --git a/math/fibonacci.cpp b/math/fibonacci.cpp
index 1a5f4afb4..034b91970 100644
--- a/math/fibonacci.cpp
+++ b/math/fibonacci.cpp
@@ -5,6 +5,8 @@
  * Calculate the the value on Fibonacci's sequence given an
  * integer as input.
  * \f[\text{fib}(n) = \text{fib}(n-1) + \text{fib}(n-2)\f]
+ *
+ * @see fibonacci_large.cpp
  */
 #include <cassert>
 #include <iostream>
@@ -15,7 +17,8 @@
 int fibonacci(unsigned int n) {
     /* If the input is 0 or 1 just return the same
        This will set the first 2 values of the sequence */
-    if (n <= 1) return n;
+    if (n <= 1)
+        return n;
 
     /* Add the last 2 values of the sequence to get next */
     return fibonacci(n - 1) + fibonacci(n - 2);
diff --git a/others/fibonacci_large.cpp b/others/fibonacci_large.cpp
index 6f36702a2..6b556066a 100644
--- a/others/fibonacci_large.cpp
+++ b/others/fibonacci_large.cpp
@@ -1,11 +1,14 @@
 /**
- * Computes N^th Fibonacci number given as
+ * @file
+ * @brief Computes N^th Fibonacci number given as
  * input argument. Uses custom build arbitrary integers library
  * to perform additions and other operations.
  *
  * Took 0.608246 seconds to compute 50,000^th Fibonacci
  * number that contains 10450 digits!
- **/
+ *
+ * @see fibonacci.cpp
+ */
 
 #include <cinttypes>
 #include <ctime>
@@ -13,6 +16,10 @@
 
 #include "./large_number.h"
 
+/** Compute fibonacci numbers using the relation
+ * \f[f(n)=f(n-1)+f(n-2)\f]
+ * and returns the result as a large_number type.
+ */
 large_number fib(uint64_t n) {
     large_number f0(1);
     large_number f1(1);