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Information × Registration Number 0303U007217, 0103U001883 , R & D reports Title The influence of the gas density fluctuations on the physical and evolutional characteristics of the planetary nebulae popup.stage_title Вплив ефектів неоднорідності густини газу на фізичні та еволюційні характеристики планетарних туманностей Head Vavrukh M.V., Registration Date 18-04-2003 Organization Ivan Franko Lviv National University. Faculty of the finance and credit popup.description2 The planetary nebulae photoionizational models grid calculations; the investigation of the gas density fluctuations influence on the planetary nebulae chemical abundance determination; the reestimation of the primordial helium abundance. Product Description popup.authors popup.nrat_date 2020-04-02 Close