1. A facility for growing plants;Berkovich;USSR Authors' Certificate No. 818563,1981
2. A facility for growing plants;Berkovich;USSR Authors' Certificate No. 914004,1982
3. A facility for conveyer-type cultivation of plants;Berkovich;USSR Authors' Certificate No. 1748753,1992
4. A facility for conveyer-type cultivation of plants and its modification;Berkovich,1997
5. Perspectives of developing space greenhouse for the international space station;Berkovich,1997