1 “... courses in the United States, it is very possible that, at many institutions, the text may be found more...”

2 “... Capital and Mobility. For the first event, Mathematicians from Poland, Sweden, United States and France...”

3 “... heart attack in New York. He was then near the end of a one-year visit in the United States. When news...”

4 “..., Netherlands, - mania, Russia, Spain, Switzerland, the United Kingdom and the United States. During a period...”