Executing code in the past: efficient in-memory object graph versioning.

Frédéric Pluquet Stefan Langerman Roel Wuyts Executing code in the past: efficient in-memory object graph versioning. 391-408 2009 OOPSLA http://doi.acm.org/10.1145/1640089.1640118 conf/oopsla/2009 db/conf/oopsla/oopsla2009.html#PluquetLW09