Prof. Ahmad Taher Azar,
http://link.springer.com/chapter/10.1007/978-3-319-13132-0_6 http://link.springer.com/chapter/10.1007/978-3-319-13132-0_6…
http://link.springer.com/chapter/10.1007/978-3-319-13132-0_6 http://link.springer.com/chapter/10.1007/978-3-319-13132-0_6…
http://link.springer.com/chapter/10.1007/978-3-319-13132-0_3 http://link.springer.com/chapter/10.1007/978-3-319-13132-0_3…
http://link.springer.com/chapter/10.1007/978-3-319-13132-0_1 http://link.springer.com/chapter/10.1007/978-3-319-13132-0_1…
http://link.springer.com/chapter/10.1007/978-3-319-13132-0_2 http://link.springer.com/chapter/10.1007/978-3-319-13132-0_2…