1. Catalog of the Ball Valves. http://www.samaravolgomash.ru/products/welded_valves.
2. Ball Valve FK76M. http://www.irimex.ru/services/catalog/armatura/flowserve/argus/fk76m.
3. Cataloges of the Ball Valves. http://www.broen.ru/product_ballorex.php?info=21.
4. Catalog RC.08.A8.50 Danfoss (2008). http://www.danfoss-rus.ru/catalog/_sec69.html.
5. The shut-off and control ball valve, The Russian Federation patent for useful model No.131115 of 11.02.2013 according to the request No.2012142036 with a priority of 02.10.12.