* Andrzej Granas and James Dugundji, Fixed Point Theory ( 2003 ) Springer-Verlag, New York, ISBN 0-387-00173-5
* Andrzej Granas and James Dugundji, Fixed Point Theory ( 2003 ) Springer-Verlag, New York, ISBN 0-387-00173-5.
* Andrzej Granas and James Dugundji, Fixed Point Theory ( 2003 ) Springer-Verlag, New York, ISBN 0-387-00173-5
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