@article{PHSC_1997__2_2_231_0,
     author = {Schwartz, Robert},
     title = {Pictures, puzzles, and paradigms},
     journal = {Philosophia Scientiae},
     pages = {231--242},
     publisher = {\'Editions Kim\'e},
     volume = {2},
     number = {2},
     year = {1997},
     language = {en},
     url = {http://www.numdam.org/item/PHSC_1997__2_2_231_0/}
}