Concept of measuring and calculation system, based on electronic clinometers to determine the geometry of railway track in the vertical plane / Michał STRACH, Grzegorz LENDA // W: 7\textsuperscript{th} MMT : 7\textsuperscript{th} international symposium on Mobile Mapping Technology : Cracow, 13–16 June 2011 : abstracts / technical ed. Marta Borowiec ; Association of Polish Surveyors, Polish Society of Photogrammetry and Remote Sensing. — [Cracow : Stowarzyszenie Geodetów Polskich], [2011]. — ISBN: 978-83-61576-15-0. — S. 97–98

Splines and kriging – the use of two methods for shell structures shape analysis / Grzegorz LENDA, Marcin LIGAS // W: FIG Working Week 2011 & 6\textsuperscript{th} national congress of ONIGT [Dokument elektroniczny] : bridging the gap betwen cultures : Marrakech, Morocco, May 18–22, 2011 : technical programme and proceedings. — Wersja do Windows. — Dane tekstowe. — [S. l.] : International Federation of Surveyors, cop. 2011. — ISBN: 978-87-90907-92-1. — S. 1–13. — Tryb dostępu: http://www.fig.net/pub/fig2011/papers/ts01e/ts01e_lenda_ligas_4907.pdf [2011-12-06]. — Bibliogr. s. 12–13, Summ., Streszcz.