15th international conference on Ecology and Management of Alien Plant invasions : EMAPi 2019 : integrating research, management and policy : book of abstracts : Prague, Czech Republic, 9-13 September / edited by P.Pyšek, J. Pergl & D. Moodley .  Průhonice :  Institute of Botany Academy of Sciences,  2019  209 stran   [1, currently available 0, at library only 1]