Calcular deadline

http://stackoverflow.com/questions/1130721/t-sql-2005-adding-hours-to-a-datetime-field-with-the-result-within-working-hours

gridview anidado
http://www.progtalk.com/viewarticle.aspx?articleid=54
http://www.codeproject.com/KB/webforms/EditNestedGridView.aspx
http://msdn.microsoft.com/en-us/library/aa992038(VS.80).aspx
http://www.progtalk.com/viewarticle.aspx?articleid=1
http://www.progtalk.com/viewarticle.aspx?articleid=54