McKeague, I.W. and Utikal, K.J. (1990)."Inference for a nonlinear counting process regression model", Annals of Statistics, 18, pp.1172-1187.  

McKeague, I.W. and Utikal, K.J. (1990)."Identifying nonlinear covariate effects in semi-martingale regression models". Probability Theory and Related Fields, 87, pp.1-25.  

McKeague, I.W. and Utikal, K.J. (1990).Stochastic calculus as a tool in survival analysis: a review, Applied Mathematics and Computation, 38, pp. 23-49.  

McKeague, I.W. and Utikal, K.J. (1991). "Goodness-of-fit tests for additive hazards and proportional hazards models". Scandinavian Journal of Statistics, 18, pp.177-195.  

Utikal, K.J. (1993). "Nonparametric inference for a doubly stochastic Poisson process", J. Stoch. Procs. and their Applications, 45, 331-349.  

Utikal, K.J. (1995). "A nonparametric method for detecting neural connectivity", Proceedings of the 10th international workschop on statistical modelling. Lecture Notes in statistics,, 104, 287-295.  

Utikal, K.J. and Govindarajulu, Z. (1995). "Optimal choice from known rewards with uncertain response". Optimization, 34, 261-270.  

Babizhayev, M.A., Bours, J. and Utikal, K.J. (1996). "Isoelectric focusing of crystallins in microsections of calf and adult bovine lens". Ophthalmic Research , 28, 365-374.  

Utikal, K.J. (1997). "Nonparametric inference for Markovian interval processes". J. Stoch. Procs. and their Applications, 67, 1-23.  

Utikal, K.J. (1997). "A new method for detecting neural interconnectivity". Biol. Cybern. 76: 459-470.  

Bours,J, Ahrend,M.H.J., Utikal,K.J. (1998). "Glycation of bovine lens crystallins", Ophthalmic Research 30, 233-243.  

Utikal, I., Utikal, K.J. (1998). "Demand analysis of spanish households (EPF)". Discussion paper no. A-581. Dept. of Economics, Univ. Bonn.  

Hildenbrand, W., Kneip, A., Utikal, K.J. (1998). "Une analyse non paramétrique des distributions du revenu et des caractéristiques des ménages". Revue de Statistique Appliquée, 47, 39-56.  

Kneip, A., Utikal, K.J. (2001). "Inference for families of densities using functional principal component analysis (with discussion)". J.Amer.Statist.Assoc., June 2001. 

Kneip, A.,Utikal, K.J. (2001). "Rejoinder". J.Amer.Statist.Assoc., June 2001 

Kneip. A, and Utikal, K.J. (2001), "Time trends in the joint distributions of income and age", in: Economic Essays - A Festschrift for Werner Hildenbrand, ed. G. Debreu, W. Neuefeind, W. Trockel, New York: Springer Verlag