Thanks you quid and Gerhard Paseman for your interests. Another idea that i have just thought about is to proceed to a research via key-words. Is it possible to make this on scopus or mathscinet (i have not the access now in home) ?

to quid thanks. edit done. Thank you to Arturo Magidin. Effectively it is in mathematics. A part, checking citations and talking to expert in the fields, is there any other way that is common to mathematician and that i dont know?