main() calling itself

[heebleworp]

I keep on reading that main() is not allowed to call itself, yet the following code works for me:

#include <iostream>

int main(void)
{
	using std::cout;
	using std::cin;
	int blub;
	cout << "-1 to quit: ";
	cin >> blub;
	if (blub == -1)
	{
		cout << "Hurrah!" << std::endl;
		return 0;
	}
	cout << "Another round!" << std::endl;
	main();
}

Is my compiler allowing nonstandard behaviour? Speaking of which, could someone quote the standard on this, since I cannot find it online?

[long double main]

This sums it up nicely:
http://stackoverflow.com/questions/2128321/can-main-function-call-itself-in-c