[[https://www.golang-book.com/books/intro/10|Concurrency] [https://tour.golang.org/concurrency/1 A Tour of Go] [https://blog.golang.org/concurrency-is-not-parallelism Concurrency is not Parallelism] [https://golang.org/pkg/math/rand/ The Go Programming Language] [http://guzalexander.com/2013/12/06/golang-channels-tutorial.html Golang Channels Tutorial]