Kim, E.J. and Langer, A. and Paul, C. and Reidl, Felix and Rossmanith, P. and Sau, I. and Sikdar, S. (2015) Linear kernels and single-exponential algorithms via Protrusion Decompositions. ACM Transactions on Algorithms 12 (2), 21:1-21:41. ISSN 1549-6325.

Gutin, G. and Razgon, Igor and Kim, E.J. (2009) Minimum leaf out-branching and related problems. Theoretical Computer Science 410 (45), pp. 4571-4579. ISSN 0304-3975.

Gutin, G. and Razgon, Igor and Kim, E.J. (2008) Minimum leaf out-branching problems. In: Fleischer, R. and Xu, J. (eds.) Algorithmic Aspects in Information and Management. Lecture Notes in Computer Science 5034. Berlin, Germany: Springer Verlag, pp. 235-246. ISBN 9783540688808.