@article{03792823,
title = {On the product of self-adjoint operators.},
journal = {International Journal of Mathematics and Mathematical Sciences},
volume = {5},
year = {1982},
pages = {813-816},
doi = {10.1155/S0161171282000751},
zbl = {0503.47018},
language = {en},
url = {http://dml.mathdoc.fr/item/03792823}
}
Rehder, Wulf. On the product of self-adjoint operators.. International Journal of Mathematics and Mathematical Sciences, Tome 5 (1982) pp. 813-816. doi : 10.1155/S0161171282000751. http://gdmltest.u-ga.fr/item/03792823/