\input zb-basic \input zb-ioport \iteman{io-port 50273157} \itemau{Yin, Yunfei; Gong, Guanghong; Han, Liang} \itemti{Two-aircraft formation flight simulation system based on four-tiered architecture} \itemso{Computers & Mathematics with Applications 61, No. 8, 2323-2329 (2011).} \itemcc{} \itemut{} \itemli{doi:10.1016/j.camwa.2010.09.068} \end