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	1.	The effect of housing condition on the performance of two types of activity meters to detect estrus in dairy cows. [electronic resource] by Roelofs, J B Krijnen, C van Erp-van der Kooij, E Producer: 20170801 In: Theriogenology vol. 93 Online resources: Available from publisher's website Availability: No items available. Save to lists Add to cart (remove)
	2.	A note on the influence of starting position, time of testing and test order on the backtest in pigs. [electronic resource] by van Erp-van der Kooij, E Kuijpers, A H van Eerdenburg, F J.C.M Tielen, M J.M Publication details: Applied animal behaviour science Aug 2001 In: Applied animal behaviour science vol. 73 Online resources: Available from publisher's website Availability: No items available. Save to lists Add to cart (remove)
	3.	[Individual behavioral characteristics of pigs and their impact on production]. [electronic resource] by van Erp-van der Kooij, E Kuijpers, A H Schrama, J W Ekkel, E D Tielen, M J Producer: 20010308 In: Tijdschrift voor diergeneeskunde vol. 125 Availability: No items available. Save to lists Add to cart (remove)
	4.	Individual behavioural characteristics in pigs--influences of group composition but no differences in cortisol responses. [electronic resource] by van Erp-van der Kooij, E Kuijpers, A H van Eerdenburg, F J C M Dieleman, S J Blankenstein, D M Tielen, M J M Producer: 20030820 In: Physiology & behavior vol. 78 Online resources: Available from publisher's website Availability: No items available. Save to lists Add to cart (remove)