@article{Robnik_1997,<br/><span class="tab"></span> title={WKB expansion for the angular momentum and the Kepler problem: from the torus quantization to the exact one},<br/><span class="tab"></span> volume={30},<br/><span class="tab"></span> ISSN={1361-6447},<br/><span class="tab"></span> url={http://dx.doi.org/10.1088/0305-4470/30/5/032},<br/><span class="tab"></span> DOI={10.1088/0305-4470/30/5/032},<br/><span class="tab"></span> number={5},<br/><span class="tab"></span> journal={Journal of Physics A: Mathematical and General},<br/><span class="tab"></span> publisher={IOP Publishing},<br/><span class="tab"></span> author={Robnik,<br/><span class="tab"></span> Marko and Salasnich,<br/><span class="tab"></span> Luca},<br/><span class="tab"></span> year={1997},<br/><span class="tab"></span> month=mar,<br/><span class="tab"></span> pages={1719–1729} }