@ARTICLE{
author={Aktas A|,Andreev Vladimir A|,Anthonis T|,Antunovic B|,Aplin S|,Asmone A|,Astvatsatourov A|,Babaev A|,Backovic S|,Baghdasaryan A|,Baranov P|,Barrelet E|,Bartel W|,Baudrand S|,Baumgartner S|,Becker J|,Beckingham M|,Behnke O|,Behrendt O|,Belousov A|},
year={2006},
title={Search for doubly-charged Higgs boson production at HERA},
journal={PHYSICS LETTERS B},
volume={638},
number={5-6},
pages={432-440},
document_type={Article},
} 

@ARTICLE{
author={Aktas A|,Andreev Vladimir A|,Anthonis T|,Antunovic B|,Aplin S|,Asmone A|,Astvatsatourov A|,Babaev A|,Backovic S|,Baghdasaryan A|,Baranov P|,Barrelet E|,Bartel W|,Baudrand S|,Baumgartner S|,Becker J|,Beckingham M|,Behnke O|,Behrendt O|,Belousov A|},
year={2006},
title={Diffractive photoproduction of rho mesons with large momentum transfer at HERA},
journal={PHYSICS LETTERS B},
volume={638},
number={5-6},
pages={422-431},
document_type={Article},
}