M. Rebenciuc, Binary relations - addenda 1 (kernel, restrictions and
inducing, relational morphisms), UPB, Sci. Bulll. Series A, vol. 70, no.
3, pp. 11–22, 2008.
 M. Rebenciuc, Binary relations - addenda 2 (sections, composabilities),
UPB, Sci. Bulll. Series A, vol. 71, no. 1, pp. 21–32, 2009.
 M. Rebenciuc, Rough sets - generalizations and applications, (manuscript
 M. Rebenciuc, Rough sets in (weak) nonhomogeneous relational approximation
spaces and in generalized topological approximation spaces with
applications, IEEE Transactions on Fuzzy Systems, FUZZ (under review),
 Z. Pawlak, Rough sets, International Journal of Computer and Information
Sciences, vol. 5, no. 11, pp. 341–356, 1982.
 Z. Pawlak and A. Skowron Rudiments of rough sets, Information Sciences,
vol. 177, no. 1, pp. 3–27, 2007.
 R. Slowinski (ed.), Intelligent decision support: handbook of applications
and advances of the rough sets theory, Kluwer Academic Publishers,
 J. Peters and A. Skowron (eds.), Transactions on rough sets XX, 1st ed.,
LNCS 10020, Springer, 2016.
 V. Flores et al. (eds.), Rough sets and knowledge technology, LNAI 9920,
 Z. Pawlak and A. Skowron, Rough sets: some extensions, Information
Sciences, vol. 177, no. 1, pp. 28–40, 2007.
 L. D’eer et al., Neighborhood operators for covering - based rough sets,
Information Sciences, vol. 336, pp. 21–44, 2016.
 B. Tripathy and D. Acharjya, Approximation of classification and
measures of uncertainty in rough sets on two universal sets, International
Journal Advanced Science and Technology, vol. 40, pp. 77–90, 2012.
 N. Thuan, Covering rough sets from a topological point of view,
International Journal of Computer Theory and Engineering, vol. 1, no.
5, pp. 606–609, 2009.
 H. Mustafa and F. Sleim, Generalized closed sets in ditopological texture
spaces with application in rough set theory, Journal of Advances in
Mathematics, vol. 4, no. 2, pp. 394–407, 2013.
 M. Diker, A category approach to relation preserving functions in rough
set theory, International Journal of Approximate Reasoning, vol. 56, pp.
 D. Dubois and H. Prade et al., Articles written on the occasion of the
50th anniversary of rough set theory, Rapport Interne IRIT, 2015.
 E. Kerre et al., An overview of the fuzzy axiomatic systems and
characterization proposed at Ghent University, Axioms, vol. 5, no. 2,
pp. 1–13, 2016.
 L. A. Zadeh, Fuzzy sets, Information and Control, vol. 8, no. 3, pp.
 D. Dubois and H. Prade, Rough fuzzy sets and fuzzy rough sets,
International Journal of General System, vol. 17, no. 2-3, pp. 191–209,
 D. Miao et al. (eds.), Rough sets and knowledge technology, LNAI 8818,
Springer, pp. 3–76, 2014.
 D. Ciucci et al. (eds.), Rough sets and knowledge technology, LNAI
9436, Springer, pp. 191–254, 2015.
 A. Das et al., A profit maximizing solid transportation model under
rough interval approach, IEEE Transactions on Fuzzy Systems, vol. 25,
no. 3, pp. 485–498, 2017.
 D. Hu et al., Statistical inference in rough set theory based on Kolmogorov
- Smirnov goodness-of-fit test, IEEE Transactions on Fuzzy
Systems, vol. PP, no. 99, 2017.
 J. Dai et al., Neighbor inconsistent pair selection for attribute reduction
by rough set approach, IEEE Transactions on Fuzzy Systems, vol. PP,
no. 99, 2017.
 M. Aggarwal, Rough information set and its applications in decision
making, IEEE Transactions on Fuzzy Systems, vol. 25, no. 2, pp. 265–
 Y. Yang et al., Incremental perspective for feature selection based on
fuzzy rough sets, IEEE Transactions on Fuzzy Systems, vol. PP, no. 99,
 J. Gross et al. (eds.), Handbook of graph theory, 2nd ed., CRC Press,
 L. H. Harper, Optimal assignment of numbers to vertices, Journal of
SIAM, vol. 12, pp. 131–135, 1964.
 G. Chaty, On critically and minimally k-vertex (arc) strongly connected
digraphs, Proc., Keszthely, pp. 193–203, 1976.
 Y. O. Hamidoune, Sur les atomes d’un graphe orient´e, CR Acad. Sci.
Paris A, vol. 284, pp. 1253–1256, 1977.
 Y. O. Hamidoune, A property of a-fragments of a digraph, Discrete
Mathematics, vol. 31, no. 1, pp. 105–106, 1980.
 Y. O. Hamidoune, Quelques problemes de connexit´e dans les graphes
orient´es, Journal of Combinatorial Theory, Series B, vol. 30, no. 1, pp.
 R. Milner, The space and motion of communicating agents, Cambridge
University Press, 2009.
 M. Sevegnani and M. Calder, Bigraphs with sharing, Theoretical Computer
Science, vol. 577, pp. 43–73, 2015.
 J. Webb et al., Graph theory applications in network security, Grin
 E. Tracada and A. Caperna, A new paradigm for deep sustainability:
biourbanism, Proc. Application of Efficient & Renewable Energy Technologies
in Low Cost Buildings and Construction, pp. 367–381, 2013.
 B. Ak and E. Koc, A guide for genetic algorithm based on parallel
machine scheduling and flexible job-shop scheduling, Procedia-Social and
Behavioral Sciences, vol. 62, pp. 817–823, 2012.
 R. Capello, The City Network Paradigm: Measuring Urban Network
Externalities, Urban Studies, vol. 37, no. 11, pp. 1925–1945, 2000.