@article{RSMUP_1965__35_2_365_0, author = {Angotti, Rodney}, title = {The projective invariants of the configuration of two lines and a third order differential element}, journal = {Rendiconti del Seminario Matematico della Universit\`a di Padova}, volume = {35}, year = {1965}, pages = {365-370}, mrnumber = {211336}, zbl = {0139.15103}, language = {en}, url = {http://dml.mathdoc.fr/item/RSMUP_1965__35_2_365_0} }
Angotti, Rodney. The projective invariants of the configuration of two lines and a third order differential element. Rendiconti del Seminario Matematico della Università di Padova, Tome 35 (1965) pp. 365-370. http://gdmltest.u-ga.fr/item/RSMUP_1965__35_2_365_0/
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