Аннотация:The results of the SERP-E-184 experiment at the U-70 accelerator (IHEP, Protvino) are presented. Interactions of the 70GeV proton beam with carbon, silicon and lead targets were studied to detect decays of charmed D0D0 , D¯0D¯0 , D+D+ , D−D− mesons and Λ+cΛc+ baryon near their production threshold. Measurements of lifetimes and masses have shown a good agreement with PDG data. The inclusive cross-sections of charm production and their A-dependences have been obtained. The yields of these particles are compared with the theoretical predictions and the data of other experiments. The measured cross-section of the total open charm production ( σtot(cc¯)=7.1±2.3(stat)±1.4(syst)σtot(cc¯)=7.1±2.3(stat)±1.4(syst) μb/nucleon) at the collision c.m. energy √s=11.8√s=11.8 GeV is well above the QCD model predictions. The contributions of different kinds of charmed particles to the total cross-section of the open charm production in proton-nucleus interactions vary with energy.