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Lasiecka, Irena; Stahel, Andreas (1990). The wave equation with semilinear Neumann boundary conditions Nonlinear Analysis, Theory, Methods and Applications, 15(1), pp. 39-58. Elsevier
Flamm, Verena; Hofmann, Christa; Dobrusskin, Sebastian; Banik, Gerhard (1990). Conservation of Tracing Papers In: 9th Triennial Meeting, Dresden, German Democratic Republic, 26-31 August 1990 2 (pp. 463-467). ICOM Committee for Conservation, Los Angeles
Hendriks, Klaus B.; Dobrusskin, Sebastian (1990). The conservation of painted photographs In: 9th Triennial Meeting, Dresden, German Democratic Republic, 26-31 August 1990 1 (pp. 249-254). ICOM Committee for Conservation, Los Angeles
