@article{DVMG_2003_4_1_a12,
     author = {E. V. Ashikhmina and Yu. G. Izrailsky and E. Ya. Frisman},
     title = {Harvest optimization for {Rikker's} population, when environment parameters limiting population growth change cyclically},
     journal = {Dalʹnevosto\v{c}nyj matemati\v{c}eskij \v{z}urnal},
     pages = {127--133},
     publisher = {mathdoc},
     volume = {4},
     number = {1},
     year = {2003},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DVMG_2003_4_1_a12/}
}