If you would like to get in touch with me, please use the form below. Alternatively, you may send me an email (it is my name and last name at gmail dot com) or find me on social media. Please note that I do not befriend on facebook people who I never met, but if we did meet, you will be able to distinguish me from other Goldstein Piotrs out there, and please feel free to add me. You will also find me on linkedin, BlueSky, academia.edu and researchgate.