They push out from one side, but there are sleeves on the pins, or at least in the one I had taken apart there were, so be careful not to loose them. I suggest pushing them out with a pick or similar tool inside of a plastic freezer bag so you can catch anything that comes out.
Those pins with the sleeves are a bitch to remove. My Omega Planet Ocean has the same sort of pins and even pin removal tools have difficulty pushing them out. It's best to take it to a jeweller who has a special punch to get them out.
i ended up doing it myself, couldnt wait to get time to take it in, i used a tiny screwdriver to push them and they came right out. took less than 5 minutes to remove 3 links and put it back together.