which scientist is known for the heckscher–ohlin theorem and the heckscher–ohlin model ?
select distinct var_uri where brack_open var_uri dbo_knownFor dbr_Heckscher–Ohlin_theorem sep_dot var_uri rdf_type dbo_Scientist sep_dot var_uri dbo_knownFor dbr_Heckscher–Ohlin_model sep_dot brack_close