@article{00645199, title = {A self-adjoint ``simultaneous crossing of the axis''.}, journal = {Georgian Mathematical Journal}, volume = {1}, year = {1994}, pages = {173-181}, doi = {10.1007/BF02254730}, zbl = {0830.35071}, language = {en}, url = {http://dml.mathdoc.fr/item/00645199} }
Kreith, Kurt. A self-adjoint “simultaneous crossing of the axis”.. Georgian Mathematical Journal, Tome 1 (1994) pp. 173-181. doi : 10.1007/BF02254730. http://gdmltest.u-ga.fr/item/00645199/