@article{CM_1952__10__286_0, author = {Yano, Kentaro and Hiramatu, Hitosi}, title = {On the projective geometry of $K$-spreads}, journal = {Compositio Mathematica}, pages = {286--296}, publisher = {Kraus Reprint}, volume = {10}, year = {1952}, zbl = {0048.16101}, mrnumber = {53589}, language = {en}, url = {http://www.numdam.org/item/CM_1952__10__286_0/} }