\begin{thebibliography}{10}

\bibitem{W1}
Md.~Sohrab Hossain, Nik Norulaini Nik~Ab Rahman, Venugopal Balakrishnan,
  Vignesh~R. Puvanesuaran, Md. Zaidul~Islam Sarker, and Mohd Omar~Ab Kadir.
\newblock {Infectious Risk Assessment of Unsafe Handling Practices and
  Management of Clinical Solid Waste}.
\newblock {\em {International Journal of Environmental Research and Public
  Health}}, 10(2):556--567, 2013.

\bibitem{W2}
Mahmut AKBOLAT, Cemile DEDE, Oguz ISIK, and Hakan SAGLAM.
\newblock {Medical Waste Management Practices in Turkey: A Case Study in
  Sakarya}.
\newblock {\em Pakistan Journal of Medical Sciences}, 27(4), 2011.

\bibitem{W4}
Issam~A Al-Khatib and Chikashi Sato.
\newblock {Solid Health Care Waste Management Status at Health Care Centers in
  the West Bank--Palestinian Territory.}
\newblock {\em Waste Management}, 29(8):2398--403, 2009.

\bibitem{W6}
Akinwale Coker, Abimbola Sangodoyin, Mynepalli Sridhar, Colin Booth, Paul
  Olomolaiye, and Felix Hammond.
\newblock {Medical Waste Management in Ibadan, Nigeria: Obstacles and
  Prospects.}
\newblock {\em Waste Manag}, 29(2):804--11, 2009.

\bibitem{W3}
Magda M.~Abd El-Salam.
\newblock {Hospital Waste Management in El-Beheira Governorate, Egypt}.
\newblock {\em Journal of Environmental Management}, 91(3):618--629, 2010.

\bibitem{W5}
Felicia Nemathaga, Sally Maringa, and Luke Chimuka.
\newblock {Hospital Solid Waste Management Practices in Limpopo Province, South
  Africa: a Case Study of Two Hospitals.}
\newblock {\em Waste Management}, 28(7):1236--1245, 2008.

\bibitem{MN}
Jos\'{e} Neves, Jorge Ribeiro, Paulo A.~A. Pereira, Victor Alves, Jos\'{e}
  Machado, Ant\'{o}nio Abelha, Paulo Novais, C\'{e}sar Analide, Manuel Santos,
  and Manuel Fern\'{a}ndez-Delgado.
\newblock {Evolutionary Intelligence in Asphalt Pavement Modeling and
  Quality-of-Information}.
\newblock {\em Progress in Artificial Intelligence}, 1(1):119--135, 2012.

\bibitem{H1}
Anabela Botelho.
\newblock {Achieving Compliance With Healthcare Waste Management Regulations:
  Empirical Evidence From Small European Healthcare Units}.
\newblock 2011.

\bibitem{H2}
{Gest{\~a}o de Res{\'i}duos Hospitalares para Unidades de Cuidados Continuados
  Integrados}.
\newblock Technical report, Minist{\'e}rio da Sa{\'u}de, 2011.

\bibitem{KR}
Jos{\'e} Alferes and Lu{\'i}s Pereira.
\newblock {\em Reasoning With Logic Programming}.
\newblock Lecture Notes in Artificial Intelligence. Springer, 1111 edition,
  1996.

\bibitem{MN2}
Jos{\'e} Neves.
\newblock {A Logic Interpreter to Handle Time and Negation in Logic Data
  Bases}, booktitle = {Proceedings of the 1984 Annual Conference of the ACM on
  The Fifth Generation Challenge}, series = {ACM '84}, year = {1984}, isbn =
  {0-89791-144-X}, pages = {50--54}, numpages = {5}, url =
  {http://doi.acm.org/10.1145/800171.809603}, doi = {10.1145/800171.809603},
  acmid = {809603}, publisher = {ACM}, address = {New York, NY, USA}, keywords
  = {Assumption, Logic data base, Negative information, Open world, Prolog,
  Query-by-example, Time stamping},.

\bibitem{MN3}
Marc Denecker and Antonis~C. Kakas.
\newblock {Abduction in Logic Programming}.
\newblock In {\em Computational Logic: Logic Programming and Beyond, Essays in
  Honour of Robert A. Kowalski, Part I}, pages 402--436, London, UK, UK, 2002.
  Springer-Verlag.

\bibitem{MN4}
Jos{\'e} Neves, Jos{\'e} Machado, C{\'e}sar Analide, Ant{\'o}nio Abelha, and
  Lu{\'i}s Brito.
\newblock {The Halt Condition in Genetic Programming}.
\newblock In Jos{\'e} Neves, Manuel~Filipe Santos, and Jos{\'e} Machado,
  editors, {\em Progress in Artificial Intelligence, 13th Portuguese Conference
  on Aritficial Intelligence, EPIA 2007, Workshops: GAIW, AIASTS, ALEA, AMITA,
  BAOSW, BI, CMBSB, IROBOT, MASTA, STCS, and TEMA, Guimarães, Portugal,
  December 3-7, 2007, Proceedings}, volume 4874 of {\em Lecture Notes in
  Computer Science}, pages 160--169. Springer, 2007.

\end{thebibliography}
