A sua busca - integration concurrent programming recursion versus virtual* - não corresponde a nenhum registro.

Talvez deva tentar algumas variações de ortografia:
integration concurrent » integration concurrency, integration current, integration concept
concurrent programming » constraint programming, concurrent programs
programming recursion » programming decision, programming session, programming decisions
recursion versus » deduction versus, inclusion versus, recursion arrays
versus virtual » versus virtue, versus visual, versus actual

Você pode obter mais resultados ajustando o argumento de busca.