@article{ Solr-acta15613, title = {Spectral order, real analytic waves and commutativity of selfadjoint operators}, series = {Acta scientiarum mathematicarum}, author = {Uchiyama Mitsuru}, year = {1996}, url = {http://acta.bibl.u-szeged.hu/15613/1/math_062_numb_001_002_259-269.pdf} }