@article{04211851, title = {Factor-union representation of phenotype systems.}, journal = {Mathematica Pannonica}, volume = {1}, year = {1990}, pages = {107-110}, zbl = {0732.92012}, language = {en}, url = {http://dml.mathdoc.fr/item/04211851} }
Länger, Helmut. Factor-union representation of phenotype systems.. Mathematica Pannonica, Tome 1 (1990) pp. 107-110. http://gdmltest.u-ga.fr/item/04211851/