C. Fleck, and A. Müller. Österreichische Zeitschrift für Geschichtswissenschaften, 8 (1):
101-126(1997)https://nbn-resolving.org/urn:nbn:de:0168-ssoar-235029. (ALLBUS).
L. Margat, B. Thonon, and L. Tadrist. Compact heat exchangers for the process industries: proceedings of the International Conference on Compact Heat Exhangers for the Process Industries, page 323--329. (1997)