@article{700647,
     title = {Maximal linked systems in topology},
     booktitle = {General topology and its relations to modern analysis and algebra IV},
     series = {GDML\_Books},
     publisher = {Society of Czechoslovak Mathematicians and Physicist},
     address = {Praha},
     year = {1977},
     pages = {28-36},
     mrnumber = {MR0467656},
     zbl = {0384.54013},
     url = {http://dml.mathdoc.fr/item/700647}
}

Baayen, Cor P. Maximal linked systems in topology, dans General topology and its relations to modern analysis and algebra IV, GDML_Books,  (1977), pp. 28-36. http://gdmltest.u-ga.fr/item/700647/