Reverse engineering someone else's color post-work borders on impossible, because there are hundreds of ways to achieve the same thing.
Especially since you're asking us to explore several shots that were all done very differently from what I can tell.
Honestly the first one you linked looks like one done with a Photoshop action I have called Fashion Lomo:
http://photoshoptutorials.ws/photosh...all-pages.html
If they're all by the same person, I wouldn't doubt that more actions were used as well.
There's a girl on DeviantART who gives away hundreds of PS actions that give results that remind me of these shots as well:
http://night-fate.deviantart.com