el. J theor Biol 248: 411-417. 156. Antal T, PL Krapivsky (2007). Molecular spiders with memory. Phys Rev E 76: 021121. 157. Antal T, PL Krapivsky, K Mallick (2007). Molecular spiders in one dimension. J Stat Mech- Theory E: P08027. 158. Antal T, PL Krapivsky, S Redner, M Mailman, B Chakraborty (2007). Dy