@article{GDZPPN001251171,
title = {An algebraic proof of Isbell' s zigzag theorem.},
journal = {Semigroup forum},
volume = {12},
year = {1976},
pages = {83-88},
zbl = {0325.20064},
url = {http://dml.mathdoc.fr/item/GDZPPN001251171}
}
Storrer, H. An algebraic proof of Isbell' s zigzag theorem.. Semigroup forum, Tome 12 (1976) pp. 83-88. http://gdmltest.u-ga.fr/item/GDZPPN001251171/