| 2008 | IJCNN | Ensembles of k-nearest neighbors and dimensionality reduction. | Oleg Okun, Helen Priisalu |
| 2008 | IJCNN | Dataset complexity can help to generate accurate ensembles of k-nearest neighbors. | Oleg Okun, Giorgio Valentini |
| 2007 | IBPRIA | Random Forest for Gene Expression Based Cancer Classification: Overlooked Issues. | Oleg Okun, Helen Priisalu |
| 2006 | ESANN | Selection of more than one gene at a time for cancer prediction from gene expression data. | Oleg Okun, Nikolay G. Zagoruiko, Alexessander Alves, Olga Kutnenko, Irina Borisova |
| 2003 | ESANN | Classification of handwritten digits using supervised locally linear embedding algorithm and support vector machine. | Olga Kouropteva, Oleg Okun, Matti Pietikinen |
| 2003 | IBPRIA | Supervised Locally Linear Embedding Algorithm for Pattern Recognition. | Olga Kouropteva, Oleg Okun, Matti Pietikinen |
| 2003 | ICANN | Supervised Locally Linear Embedding. | Dick de Ridder, Olga Kouropteva, Oleg Okun, Matti Pietikinen, Robert P. W. Duin |
| 2002 | ICPR | Robust Text Detection from Binarized Document Images. | Oleg Okun, Yu Yan, Matti Pietikinen |
| 2001 | ICDAR | Edge-Based Method for Text Detection from Complex Document Images. | Matti Pietikinen, Oleg Okun |
| 2000 | ICPR | Automatic Ground-Truth Generation for Skew-Tolerance Evaluation of Document Layout Analysis Methods. | Oleg Okun, Matti Pietikinen |
| 1999 | ICDAR | Robust Skew Estimation on Low-Resolution Document Images. | Oleg Okun, Matti Pietikinen, Jaakko J. Sauvola |
| 1993 | CAIP | Printed Text Segmentation Using Distance Transform. | Sergey Ablameyko, Oleg Okun |
| 1993 | ICCV | A system for automatic vectorization and interpretation of map-drawings. | Sergey Ablameyko, Vladimir Bereishik, Oleg Frantskevich, Maria Homenko, E. Melnik, Oleg Okun, Nadeshda Paramonova |