Analysis of information sources in references of the Wikipedia article "Object copying" in English language version.
shallowCopy); if the values are copied, then they are not shared (deepCopy)." Goldberg, Adele; Robson, David (1983). Smalltalk-80: The Language and its Implementation. Palo Alto, California: Xerox Palo Alto Research Center. ISBN 978-0-201-11371-6.copy is shallowCopy. In subclasses in which copying must result in a special combination of shared and unshared variables, the method associated with copy is usually reimplemented, rather than the method associated with shallowCopy or deepCopy." Goldberg, Adele; Robson, David (1983). Smalltalk-80: The Language and its Implementation. Palo Alto, California: Xerox Palo Alto Research Center. ISBN 978-0-201-11371-6.