@article{ Joseph Beltšikov 90 _2010, url={https://ojs.utlib.ee/index.php/EA/article/view/10673}, DOI={10.15157/ea.v0i0.10673}, abstractNote={ Eesti Arst 2010; 89(11):769 }, journal={Eesti Arst}, year={2010}, month={Nov.} }