"Bulgaria in transition: environmental consequences of political and economic transformation", eds. Krassimira Paskaleva, Philip Shapira, John Pickles, Boian Koulov, Ashgate 1998 : [recenzja]

European Spatial Research and Policy, Tom 8, Numer 2 (2001) s. 102-103
Jo Crotty , Krassimira Paskaleva (aut. dzieła rec.), Philip Shapira (aut. dzieła rec.), John Pickles (aut. dzieła rec.), Boian Koulov (aut. dzieła rec.)