Add blog post references to readme (#93)

README.md

@@ -6,10 +6,14 @@
 
 Concurrent data structures for Go. Aims to provide more scalable alternatives for some of the data structures from the standard `sync` package, but not only.
 
+Covered with tests following the approach described [here](https://puzpuzpuz.dev/testing-concurrent-code-for-fun-and-profit).
+
 ## Benchmarks
 
 Benchmark results may be found [here](BENCHMARKS.md). I'd like to thank [@felixge](https://github.com/felixge) who kindly run the benchmarks on a beefy multicore machine.
 
+Also, a non-scientific, unfair benchmark comparing Java's [j.u.c.ConcurrentHashMap](https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/util/concurrent/ConcurrentHashMap.html) and `xsync.MapOf` is available [here](https://puzpuzpuz.dev/concurrent-map-in-go-vs-java-yet-another-meaningless-benchmark).
+
 ## Usage
 
 The latest xsync major version is v2, so `/v2` suffix should be used when importing the library: