Lua APA (7ú heag.)

Alkema, W. B. L. (2002). Kinetic and structural studies of penicillin acylase from Escherichia coli. Rijksuniversiteit te Groningen.

Lua i Stíl Chicago (17ú heag.)

Alkema, Wynand Bernlef Liudger. Kinetic and Structural Studies of Penicillin Acylase from Escherichia Coli. Netherlands: Rijksuniversiteit te Groningen, 2002.

Lua MLA (8ú heag.)

Alkema, Wynand Bernlef Liudger. Kinetic and Structural Studies of Penicillin Acylase from Escherichia Coli. Rijksuniversiteit te Groningen, 2002.

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