@article{PHSC_2003__7_2_165_0,
     author = {Eckert, Michael},
     title = {The practical theorist : {Sommerfeld} at the crossroads of mathematics, physics and technology},
     journal = {Philosophia Scientiae},
     pages = {165--188},
     publisher = {\'Editions Kim\'e},
     volume = {7},
     number = {2},
     year = {2003},
     language = {en},
     url = {http://www.numdam.org/item/PHSC_2003__7_2_165_0/}
}