Credits and additional documentation

src/Polly.Contrib.WaitAndRetry/Backoff.DecorrelatedJitterV2.cs

@@ -29,6 +29,9 @@ public static IEnumerable<TimeSpan> DecorrelatedJitterBackoffV2(TimeSpan medianF
 
             return Enumerate(medianFirstRetryDelay, retryCount, fastFirst, new ConcurrentRandom(seed));
 
+            // The original author/credit for this jitter formula is @george-polevoy . Jitter formula used with permission as described at https://github.com/App-vNext/Polly/issues/530#issuecomment-526555979 
+            // Minor adaptations (pFactor = 4.0 and rpScalingFactor = 1 / 1.4d) by @reisenberger, to scale the formula output for easier parameterisation to users.
+
             IEnumerable<TimeSpan> Enumerate(TimeSpan scaleFirstTry, int maxRetries, bool fast, ConcurrentRandom random)
             {
                 // A factor used within the formula to help smooth the first calculated delay.

src/Polly.Contrib.WaitAndRetry/ConcurrentRandom.cs

@@ -15,6 +15,9 @@ internal sealed class ConcurrentRandom
         // Also note that in concurrency testing, using a 'new Random()' for every thread ended up
         // being highly correlated. On NetFx this is maybe due to the same seed somehow being used
         // in each instance, but either way the singleton approach mitigated the problem.
+
+        // For more discussion of different approaches to randomization in concurrent scenarios: https://github.com/App-vNext/Polly/issues/530#issuecomment-439680613
+
         private static readonly Random s_random = new Random();
         private readonly Random _random;