I would love to learn more about this. I've been programming in OCaml for a few months now and have stuck to records and immutable updates and modules for group

I would love to learn more about this. I've been programming in OCaml for a few months now and have stuck to records and immutable updates and modules for grouping behaviour. I really like this style compared to the object-oriented programming I was doing in Ruby. Real World OCaml has a chapter on objects and I'll give it one more read. But are there any other articles/links that expands on OCaml's object system and how it compares to conventional OO?