by Nicolaus, M., Piault, R., Ubels, R., Tinbergen, J. M., Dingemanse, N. J.
Published in Journal of evolutionary biology (01.09.2016)

by Tinbergen, J. M., Fokkema, R. W., Pen, I., Ubels, R.
Published in Journal of avian biology (01.08.2019)

by Nuyttens, J, Ubels, R, Van er Voort van Zyp, N
Published in International journal of radiation oncology, biology, physics (01.09.2014)

by Nicolaus, M, Brommer, J. E, Ubels, R, Tinbergen, J. M, Dingemanse, N. J
Published in Journal of evolutionary biology (01.09.2013)

by Tinbergen, J.M., Tinbergen, J., Ubels, R.
Published in Ardea (01.01.2014)

by Kuijper, Dries Pieter Jan, Ubels, R, Loonen, M. J. J. E
Published in Polar biology (01.12.2009)

by Ubels, R
Published in Tropical doctor (01.04.1989)

by Kuijper, D.P.J, Bakker, J.P, Cooper, E.J, Ubels, R, Jónsdóttir, I.S, Loonen, M.J.J.E
Published in Botany (01.06.2006)

by Drogtrop, Adrian P., Ubels, Roel, Nijhuis, Jan G.
Published in Early human development (01.06.1990)