Vertex labellings of simple graphs (Monographie)	Research and Exposition in Mathematics vol. 34, 155 pp., Heldermann Verlag (2015), ISBN 978-3-88538-234-8
Conjecture on Dinitz Problem and Improvement of Hrnčiar’s Result	Acta Univ. M. Belii, Math. 21 (2013), p. 43-53