Polish Journal of Natural Sciences
Polish Journal of Natural Sciences > 2009 > 24 > 2 > 113-121
Polish Journal of Natural Sciences > 2009 > 24 > 4 > 245-253
Polish Journal of Natural Sciences > 2009 > 24 > 2 > 113-121
Polish Journal of Natural Sciences > 2009 > 24 > 4 > 245-253