Krol, P. (2008). Linear polyurethanes: Synthesis methods, chemical structures, properties and applications. VSP.
Lua i Stíl Chicago (17ú heag.)Krol, Piotr. Linear Polyurethanes: Synthesis Methods, Chemical Structures, Properties and Applications. Leiden: VSP, 2008.
Lua MLA (9ú heag.)Krol, Piotr. Linear Polyurethanes: Synthesis Methods, Chemical Structures, Properties and Applications. VSP, 2008.
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