An example of a simple triod with surjective span smaller than span.
Lelek, A.
Pacific J. Math., Tome 67 (1976) no. 2, p. 207-215 / Harvested from Project Euclid
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Publié le : 1976-05-14
Classification:  54F20 
@article{1102867226,
     author = {Lelek, A.},
     title = {An example of a simple triod with surjective span smaller than span.},
     journal = {Pacific J. Math.},
     volume = {67},
     number = {2},
     year = {1976},
     pages = { 207-215},
     language = {en},
     url = {http://dml.mathdoc.fr/item/1102867226}
}

Lelek, A. An example of a simple triod with surjective span smaller than span.. Pacific J. Math., Tome 67 (1976) no. 2, pp.  207-215. http://gdmltest.u-ga.fr/item/1102867226/