diff --git a/src/commandline.cpp b/src/commandline.cpp
index 752b8c1..fabd990 100644
--- a/src/commandline.cpp
+++ b/src/commandline.cpp
@@ -10,7 +10,8 @@
 namespace bx
 {
 	// Reference:
-	// http://msdn.microsoft.com/en-us/library/a1y7w461.aspx
+	// - https://web.archive.org/web/20180629044234/https://msdn.microsoft.com/en-us/library/a1y7w461.aspx
+	//
 	const char* tokenizeCommandLine(const char* _commandLine, char* _buffer, uint32_t& _bufferSize, int32_t& _argc, char* _argv[], int32_t _maxArgvs, char _term)
 	{
 		int32_t argc = 0;
diff --git a/src/filepath.cpp b/src/filepath.cpp
index 215ec4b..caaf6c5 100644
--- a/src/filepath.cpp
+++ b/src/filepath.cpp
@@ -37,7 +37,7 @@ namespace bx
 	static int32_t normalizeFilePath(char* _dst, int32_t _dstSize, const char* _src, int32_t _num)
 	{
 		// Reference: Lexical File Names in Plan 9 or Getting Dot-Dot Right
-		// https://9p.io/sys/doc/lexnames.html
+		// - https://web.archive.org/web/20180629044444/https://9p.io/sys/doc/lexnames.html
 
 		const int32_t num = strLen(_src, _num);
 
diff --git a/src/timer.cpp b/src/timer.cpp
index 7bfb573..8cfebdd 100644
--- a/src/timer.cpp
+++ b/src/timer.cpp
@@ -28,8 +28,6 @@ namespace bx
 	|| BX_PLATFORM_XBOXONE \
 	|| BX_PLATFORM_WINRT
 		LARGE_INTEGER li;
-		// Performance counter value may unexpectedly leap forward
-		// http://support.microsoft.com/kb/274323
 		QueryPerformanceCounter(&li);
 		int64_t i64 = li.QuadPart;
 #elif BX_PLATFORM_ANDROID