(NkAK ^ITATX BIBLI@ I WIDETX WS@ EE CENNOSTXs - (NfI(B, (NgORDON d(B., (NsT@ART(B, (NdUGLAS(B.s ((NsANKT(B-(NpETERBURGs (NlOGOSs, 1993)