| 2010 | AAIM | The ( | Esther M. Arkin, Nili Guttmann-Beck, Refael Hassin |
| 2009 | ESA | Tractable Cases of Facility Location on a Network with a Linear Reliability Order of Links. | Refael Hassin, R. Ravi, F. Sibel Salman |
| 2007 | WG | The Complexity of Bottleneck Labeled Graph Problems. | Refael Hassin, Jrme Monnot, Danny Segev |
| 2006 | MFCS | Approximation Algorithms and Hardness Results for Labeled Connectivity Problems. | Refael Hassin, Jrme Monnot, Danny Segev |
| 2005 | ESA | An Approximation Algorithm for the Minimum Latency Set Cover Problem. | Refael Hassin, Asaf Levin |
| 2005 | ESA | Min Sum Clustering with Penalties. | Refael Hassin, Einat Or |
| 2005 | WADS | The Multi-radius Cover Problem. | Refael Hassin, Danny Segev |
| 2004 | ESA | Approximation Algorithms for Quickest Spanning Tree Problems. | Refael Hassin, Asaf Levin |
| 2004 | ESA | An Approximation Algorithm for Maximum Triangle Packing. | Refael Hassin, Shlomi Rubinstein |
| 2003 | CIAC | Differential Approximation for Some Routing Problems. | Cristina Bazgan, Refael Hassin, Jrme Monnot |
| 2003 | ESA | The Minimum Generalized Vertex Cover Problem. | Refael Hassin, Asaf Levin |
| 2002 | SODA | Capacitated vertex covering with applications. | Sudipto Guha, Refael Hassin, Samir Khuller, Einat Or |
| 2001 | IPCO | Synthesis of 2-Commodity Flow Networks. | Refael Hassin, Asaf Levin |
| 2001 | WADS | A 7/8-Approximation Algorithm for Metric Max TSP. | Refael Hassin, Shlomi Rubinstein |
| 2000 | SODA | Approximating the maximum quadratic assignment problem. | Esther M. Arkin, Refael Hassin |
| 1997 | ESA | On Local Search for Weighted k-Set Packing. | Esther M. Arkin, Refael Hassin |