from my experiances, if someone is worried about going busto on the bubble all the time, or they usually find themselves just creeping into the money without going any deeper, then they are playing out of their bankroll. On the bubble you need to pick on the right stacks. i actually like to keep the short stacks in, They are looking to gamble with any 2 cards, and in keeping the shorties in, it means the medium stacks are playing tighter because they are waiting for the shorties to get busted out. Its like poker politics in a way.
The books that have helped me on the bubble time of play........... Gus hansens book "Every hand revealed" and Arnold Synders book "poker tourny formula 2".
As for articles i dont really read the poker mags too much. Hope this helps a bit.