Thanks for the advice, but unfortunately I can't find any information about the graves on the given page.
Find a Grave only has full listings for a very few of its cemeteries. Mostly, it relies on people creating memorial pages as they find the information or to make requests. Log in or create an account if necessary (it's free). Click on Add a Memorial on the cemetery main page, and you'll get a form to create an entry for Regina. Fill in what information you have and leave the rest blank. Repeat for Jozef. Don't panic; there's an Edit option for additions or corrections. Click on Request Photo on the left of each memorial. Then be patient -- it all depends on how many volunteers there in the area and how easy it is to find the grave; for example, some cemeteries are heavily overgrown and they only cut it down once a year in autumn (if ever). You'll get an e-mail when the photo is taken or if someone reports a serious problem.
I see that Regina and Jozef are buried in different graves. This means it's possible they are in so-called "common" of "public" graves each with several unrelated people and less likely to be marked, or if marked at all, with headstone(s) for only some of the people. In such cases, Find a Grave volunteers should take a photo of the area of bare grass or the unrelated headstone(s), though some give up.
If you have any queries about the process, ask here or send me a PM.