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This work was generously supported by the Österreichischer Fonds zur Förderung der wissenschaftlichen Forschung (P 4680). The technical assistance of B. Lehner, L Raab and E.M. Petrak is gratefully acknowledged.
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Wachtler, F., Jacob, H.J., Jacob, M. et al. The extrinsic ocular muscles in birds are derived from the prechordal plate. Naturwissenschaften 71, 379–380 (1984). https://doi.org/10.1007/BF00410750
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DOI: https://doi.org/10.1007/BF00410750