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[1] Chris Rohwer, Andreas Hafver, Louise Viljoen. Boarding — step by step. A Cellular Automaton approach to optimising aircraft boarding time. The UMAP Journal 28 (3) (2007) 463–478. 6 x& h6 `9 P$ z E! Z' [% t0 k" q& s3 G' b2 P
[2] Benjamin Coate, Nelson Gross, Megan Longo. The Impending Effects of North Polar Ice Cap Melt. The UMAP Journal 29 (3) (2008) 223–224.; L; D( l2 E% |2 O3 a
/ b: B: E% O6 O4 s9 E# \[3] Bo Zhang, Yi Zhang, Tiankun Lu. A Close Look On Leaves. The UMAP Journal 33 (3) (2012) 205–222. 8 t; Y0 B+ r2 q& u: K+ n5 s8 q4 [% ~5 ]: w0 ~* l. [