... tachbai loan thanh hai d~g: bai loan Ian trUyen va bai loan khuech tan. Khi d6,chung tei cling ch(rng minh 'dH9'e,nghi?m dp xi t1'cbili toan khue.ch tantren tirng d 9an thai gian phfin ... 14-.'" \ LuAnan nay duoc ho3n thanh tai Khoa Toan-Tin hoc" .' .' . .Twang D~i Hc;>cT6ng Hqp Thanh ph6 H6 Chi MinhNgum hu(mg dAn- Ph6 Giao su Ph6 Ti€n 81Ng6 Thanh Phong-Ph6 ... -[20]T.V.LANG,N.T.PHONG,~ bai toaDIan tmyen va khuech tan cuangubn 0 nhiem, Tqp cM Khoa hqc & Gong nghf, BK & SPKT, S6 9,(1995), Ha nQi.(Bainh~n dang)[21]T.Y.LANG,Blii toan u6n thanh dan...