Patent - Automated balloon inflation device http://www.patentgenius.com/patent/5653272.html Patent - Automated balloon inflator system http://www.freepatentsonline.com/8132599.html Pneumaticke dily http://www.uxcell.com/pneumatics-c-1920_1921.html AUTOMATED BALLOONSONDE LAUNCHER http://passionforengineering.com/Automated-Balloonsonde-Launcher.php Automated Weather Balloon Radiosonde Launcher Development http://www.arm.gov/publications/proceedings/conf08/extended_abs/foote_jp.pdf Vzducholoďě - bývalí studenti ČVUT http://www.airshipclub.com/ (Kontakt na lidi ohledně hélia a práce s nim, zkušenosti s pneumatickými systémy apod.)