@inbook{404148,
title = {4. Algebraick\'e struktury},
booktitle = {Algebra, ka\v zd\'y za\v c\'atek je lehk\'y},
series = {GDML\_Books},
publisher = {Mlad\'a fronta},
address = {Praha},
year = {1986},
pages = {126-161},
url = {http://dml.mathdoc.fr/item/404148}
}
(éd.). 4. Algebraické struktury, dans Algebra, každý začátek je lehký, GDML_Books, (1986), pp. 126-161. http://gdmltest.u-ga.fr/item/404148/