Hans Boehm: Allocation and GC Myths http://www.hpl.hp.com/personal/Hans_Boehm/gc/myths.ps
Brian Goetz: Garbage collection in the HotSpot JVM http://www-128.ibm.com/developerworks/java/library/j-jtp11253/
Sun: Tuning Garbage Collection with the 5.0 Java[tm] Virtual Machine http://java.sun.com/docs/hotspot/gc5.0/gc_tuning_5.html
Sun: Garbage Collection FAQ http://java.sun.com/docs/hotspot/gc1.4.2/faq.html
Bertram Felgenhauer: Parallele GC http://141.57.11.224/~bf3/gc/