TypeScript: Access static methods within classes (the same or another ones)

TypeScript: Access static methods within classes (the same or another ones)

Suppose we have the following code:
[Test.js file]:
class Test {
...
public static aStaticFunction():void {
...
this.aMemberFunction(); // <- Issue #1.
}
private aMemberFunction():void {
...
this.aStaticFunction(); // <- Issue #2.
}
}
[Another.js file]:
class Another {
...
private anotherMemberFunction():void {
Test.aStaticFunction(); // <- Issue #3.
}
}
See the Issue #x. comments for the issues (3) I want to address.
I've been playing with some configurations by now and I don't get it all yet.
Can you help me to understand how can I access this methods in the three
places?
Thanks.