Dachev, T., Spurný, F., Reitz, G., Tomov, B. T., Dimitrov, P. G., Matviichuk, Y. N. Simultaneous investigation of galactic cosmic rays on aircrafts and on International Space Station. Advances in Space Research. 2005, 36(9), 1665-1670. ISSN 0273-1177. E-ISSN 1879-1948.