7April K B.Robert F.P.Cooperative games:a way to modify aggressive and cooperative behaviors in young children.Journal of Applied Behavior Analysis,1994,27(3),435—446.
8Celia A B,Michael S C.Changes in cooperation and self-other differenfiation during the second year.Child-Development,1990,61(4),1164—1174.
9Peter J L.Co-operation as a conditional strategy among peels: influence of social ecology and kin relations.International Journal of Behavioral Development,1996,19(1),39—52.
10Mitchell J T.Containing aggressive acting out in abused children.Child Welfare,1986,65(5),459—468.
