Effective thermal conductivity of graphite powder in helium mediumKruus, Rein; Käär, HarriTallinna Tehnikaülikooli Toimetised1991 / lk. 71-79: ill Effective thermal conductivity of graphite powder in helium mediumKruus, Rein; Käär, HarriRecent advances in heat transfer : proceedings of the First Baltic Heat Transfer Conference, Göteborg, Sweden, Aug. 26-28, 19911992 / p. 489-497: ill