@article{GDZPPN002350254,
title = {On a Computation Rule for Polars.},
journal = {Mathematica Scandinavica},
volume = {27},
year = {1970},
pages = {14-16},
zbl = {0189.42603},
url = {http://dml.mathdoc.fr/item/GDZPPN002350254}
}
Ng, Kung-Fu. On a Computation Rule for Polars.. Mathematica Scandinavica, Tome 27 (1970) pp. 14-16. http://gdmltest.u-ga.fr/item/GDZPPN002350254/