Why should I believe the Pro-UN/NATO sites over the Pro-Serbian sites? That is the question that needs answering. I went there as a neutral tourist to see for myself who is lying, or, more importantly, who is telling less lies and more truths. I came back seeing firsthand the Serbs were more honest in the media war, but more "rough" out in the field.
I also tend to agree with the "Aggressive Defensive Posture" the Serb Defense Forces undertook. Considering the overwhelming odds stacked against them. You will not hear that the Serb military outside of Sarajevo was outnumbered 10:1 in numerical terms. Which explains their pounding Muslim attackes and probes with such ferocity. They also do not tell you that the Muslims were recieving fresh supply of heavy weapon munitions, etc... daily.
Each month, they were becoming stronger and their probes were more coordinated. Forcing the Serbs to counter with heavier retaliation against all fortifications. Even the ones concentrated within the Sarajevo hospital, my friend.