<span class="mw-page-title-namespace">Template</span><span class="mw-page-title-separator">:</span><span class="mw-page-title-main">Ackerhalt75a</span>
Fabrice P. Lauss𝕪's Web

Heisenberg-picture operator perturbation theory. J. R. Ackerhalt and K. Rzążewski in Phys. Rev. A 12:2549 (1975).