References
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Manteuffel, C., Schön, P. C., & Manteuffel, G. (2011). Beyond electronic feeding: The implementation of call feeding for pregnant sows. Computers and electronics in agriculture, 79(1), 36-41.
Kirchner, J., Manteuffel, G., & Schrader, L. (2012). Individual calling to the feeding station can reduce agonistic interactions and lesions in group housed sows. Journal of animal science, 90(13), 5013-5020.
Kirchner, J., Manteuffel, C., Manteuffel, G., & Schrader, L. (2014). Learning performance of gestating sows called to the feeder. Applied Animal Behaviour Science, 153, 18-25.